I'm just passing thru here, but there are many options to get a plastic part w/ 2 part epoxy, urethane,and special mixes. What size parts? How many? molding from a rigid mold requires a lot more care than making a model, casting a silicone rubber mold, and making parts from that I have made molds for architects scale models w/ the rubber molds. There are 2 part epoxies that are almost the same as any of the injectable plastics. Good luck. LL. Dallas.