Here are several resources on the internet for antique reproduction parts for your projects;

http://www.sundialwire.com/ (various color and gauge cloth covered wire, 1,2, and 3 conductors )

http://www.oselectronics.com/ose_p86.htm (various old radio parts, including ceramic insulators, and binding posts) look under the antique section

http://www.tubesandmore.com/ Antique radio and amp parts

http://www.constantines.com/ Wood specialty supply

http://houseofantiquehardware.com/s.nl/sc.11/category.-111/.f reproduction hardware of various styles

Here a few for those needing electrical, pressure, vacuum swtiches plumbing, etc.

http://shortyshvac.com/
http://www/grainger.com/