I'm assuming you are aware of the widely available Faller and International Hobby kits.
Check out these:
http://members.aol.com/_ht_a/rahmodels/page/ You also might want to look at:
http://www.geocities.com:0080/Heartland/5620/index.html http://www.chebucto.ns.ca/~ak621/CEC/Mod-Toy.html I also recall a thread some time ago on this subject, search around.
*** This post was edited by millrace on 1/26/2001. ***