This is basically how Lulzbot started: 3d printing parts for 3d printers. I know at one point they were experimenting with making molds and pouring parts, I th

This is basically how Lulzbot started: 3d printing parts for 3d printers. I know at one point they were experimenting with making molds and pouring parts, I think out of resin. But when I toured their new facility a few years later, they had a giant farm of 3D printers, so I gather that didn't work out. I have since gotten into 3d printing and have printed molds and poured silicone with good luck. Some of that silicone has been the final part, some were then used as molds for pouring resin in. I've even added glass fiber to some of that resin before pouring to make some pretty sturdy parts. Maybe some of the parts you are 3d printing now could be done with resin? Bondo makes a product with glass fiber in it, but most of the parts I'm doing are fairly small, and the bondo has long fibers in it, when I make my own fibers, I just cut fiberglass and can make it whatever length fiber I want.