try AVR....they might be able to help you out.
also...are you looking for the deluxe heater channels so you can run heat? cause if you're not set on the heat thing...the econo channels are not bad. no heat tubes, heat outlets or vents, but the shape and overall style seems to be more "correct" for early cars. i used the econo ones in my 56 and they look good. and they're in stock right now at cip.