There are houses that will do small runs of plastics using cheap molds made out of Aluminum. https://www.protolabs.com/services/injection-molding/plastic-injec

There are houses that will do small runs of plastics using cheap molds made out of Aluminum. https://www.protolabs.com/services/injection-molding/plastic-injection-molding/ https://www.protolabs.com/services/injection-molding/plastic... Far as I can tell if you're making a few hundred/thousand parts a year that's totally reasonable.