[JesseK]

Team 357 (The Jesters) has some experience molding smaller parts. They've made their own custom mecanum rollers for years now. If you have a copy of the FIRST: Behind the Design books, they're in 2007 (I think) and describe how they made quick molds for things like their battery holder, mecanum rollers, and even a 80/20 UHMW plastic linear slide.