Just thought I'd give a mention to Best Resin. They were shut down for a long time due to problems on the home front but now they're back and a lot of people probably aren't aware. They did (or maybe still do) the resin work for the JoHan. Anyway, they have one of the best lines of resin parts I've seen especially things like induction setups (complete sidedraft Weber sysytems, Carter AFB's, etc.), various standard and auto trannys, Columbia rear end, etc. Lots of stuff you can't find anywhere else. You should check it out!
http://www.bestresin.com/Index%20new.htm