I know Fujimi used to make several sets in exactly what you're looking for. I don't know if they're discontinued yet. Chimneyville hobbies and some other American manufacturers also make figures, but they are done in resin. Sorry, but I don't remeber some of the names. Do search on the internet. Check out this site
http://www.scalemodelindex.com/ He's got a lot of resources compiled on that page.
Good luck
-Walter