For an illustrated parts source online, of Classic Car parts like radios, heaters, clocks

http://www.classicaccessories.org/

Lots of cool stuff like sideboard mount luggage, picnic baskets, car shavers, travel radios, coffee clutches, lap robes, knobs, mirrors, flower vases... wow.. I'm impressed with their inventory of old car stuff! Not much in the way of prices, expect to pay very high prices.