Kits 

Peebles Originals (I Highly recommend these kits)
Radio Kits
http://www.peeblesoriginals.com/crystal-kits.html

Elmer Dude
Radio Kits
http://www.elmerdude.com/ 

Borden Radio Company
http://www.xtalman.com/    

Dan's Small Parts and Kits
http://www.danssmallpartsandkits.net/

Parts
Diodes, Variable Capacitors, Ear Plugs, Headsets, etc.

Peebles Originals
http://www.peeblesoriginals.com/

KW TUBES

http://kwtubes.com/

Their ebay store items

Variable Capacitors

http://www.stores.ebay.com/kwtubes/plistings/list/all/dept6/index.html

Ceramic Rotary Switches

http://www.stores.ebay.com/kwtubes/plistings/list/all/dept4/index.html

Ferrites

http://www.stores.ebay.com/kwtubes/plistings/list/all/dept7/index.html 

Scott's Crystal Radios
(Also Headphones)
http://members.aol.com/headphone1/phones.htm 
 

Dan's Small Parts and Kits
http://www.danssmallpartsandkits.net/
   

Computer Controlled Automation Inc.
(Diodes, Ceramic Ear plugs, Variable Capacitors)
http://www.angelfire.com/electronic2/index1/ 
 

CWS Bytemark (ferrites)
http://www.cwsbytemark.com/f_ham.htm
 
  
Fair Radio Supplies (xformers, caps, electronic parts)
http://www.fairradio.com/   
 

Ocean State Electronics
http://www.oselectronics.com/index.htm
    

Oren Elliot Products (very nice caps)
http://www.orenelliottproducts.com/index.html
     

Dave's Homemade Crystal Radio's
http://www.schmarder.com/radios/sale/orderinfo.htm
     

Rainer Steinfuehr. Publications & parts (German Outfit)
http://www.oldradioworld.de/capacit3.htm
http://www.oldradioworld.de/salemenu.htm

The Old Model Company (very nice binding posts)
http://www.oldmodels.co.uk/

Borden Radio Company
http://www.xtalman.com/
    

Dick Smith Electronics (Australia)
http://www.dse.com.au/cgi-bin/dse.storefront
    

Allied Electronics
http://www.alliedelec.com/default.asp
    

Play Things of the Past
http://www.oldradioparts.com/index.html   

Wire

Litz Wire 

Kerrigan Lewis Wire Products
No web presence yet
This is the company most people use to buy Litz, very hobby user friendly
Kerrigan Lewis Wire Products
4421 West Rice Street
Chicago, Illinois    60651   USA
Tel:   (773) 772 7208
Fax:  (773) 772 3083
  
WireTronic Inc.
http://wiretron.com/
 

New England Electric Wire Corporation
www.neewc.com  
 

MWS Wire Industries
http://www.mwswire.com/index.html  
 

Dalian Fuji Magnet Wire and Electrical Co., Ltd.
http://www.china-dalian.com/chinese/2000qiye/qy-e/fshdx-e.htm  
 

Cooner Wire
http://www.coonerwire.com/Products.html  
 

Bay Associates
http://www.baycable.com/  
 

Surplus Sales of Nebraska
http://www.surplussales.com/   
 

Standard Magnet, and Covered Wire

WireTronic Inc.
http://wiretron.com/  
 

MWS Wire Industries
http://www.mwswire.com/index.html  
 

Paramount Wire Co.
http://parawire.com/  
 

WIRES.CO.UK
http://www.wires.co.uk/index.html  
 

World Wide Wire
http://www.worldwidewire.com/  
 

RDS Wire & Cable
http://www.rdswire.com/  
 

Dalian Fuji Magnet Wire and Electrical Co., Ltd.
http://www.china-dalian.com/chinese/2000qiye/qy-e/fshdx-e.htm  
 

Cooner Wire
http://www.coonerwire.com/Products.html  
 

Bay Associates
http://www.baycable.com/
 

Xformers

Fair Radio Supplies (xformers, caps, electronic parts)
http://www.fairradio.com/

Bogen Communications
http://www.bogen.com/links.htm
 

Ocean State Electronics
http://www.oselectronics.com/index.htm
 

Mouser Electronics
http://www.mouser.com/

Bogen T725 xformers can be bought at

Electronics Outfitter $4.06 ea. No min. order
http://www.electronicsoutfitter.com/eostore/items_html/BOG-T725.html

Lashen Electronics $4.69 ea. (must buy 16 at a time)
http://www.lashen.com/vendors/bogen/Speaker_Transformers.asp

Consolidated Electronics $5.61 ea. No min. order
http://www.ceitron.com/audio/bogen.html

Mar Vac $6.00 ea. No min. order
http://www.marvac.com/products/bogen/t725_t72510.htm

Modern Radio Labs $7.50 ea. No min. order
http://www.modernradiolabs.com/Parts%202.htm

Dave’s Homemade Crystal Radio Parts $8.00 ea.
http://www.schmarder.com/radios/sale/parts.htm

Paging Systems Equipment $10.59 ea. No min. order
http://www.pagingsystemequipment.com/Catalog/Model_T725.htm

A-I Consolidated, Inc. $11.99 ea. No min. order
http://shop.store.yahoo.com/aicons/bogt7t725vol.htmln 

Supplies
 

Styrene Plastics

For Coil Forming, Various suppliers

These items can be bought at your local hobby store also

EVERGREEN STYRENE PLASTIC

Evergreen Scale Models (Plastic Stock)

Evergreen Page 1

Evergreen Scale Models (Plastic Stock)

Plastruct, Inc. - Home

Plastruct, Inc. - Online Product Detail

Plastruct line page

MTM - Styrene Plastic

Plastruct line page

Genova Products
http://www.genovaproducts.com/ 
 

Low Melting Alloys
used in mounting Galena etc.

Micro_Mark
Look under the "Resin,Wood,Metal,Plastic section"
 

McMaster-Carr
(type in "cerro" in their search box)
http://www.mcmaster.com/
 

Literature

Borden Radio Company
http://www.xtalman.com/
 

Modern Radio Laboratories®
http://www.modernradiolabs.com/