Would there be a market for QUALITY fiberglass parts?

All I can say is good luck competing against the companies out there already. There is a guy on Moparts that USED to be in the business. I would say try to talk to him but he’s a bit of an idiot that posts about stupid stuff you can’t even read. Honestly I think the resin messed up his head and not just a little bit. Like they say on Sharktank. The bigger guys would probably squish you like a bug, shipping would be crazy, a few returns would really hurt the little guy starting up, and with the internet like it is today any sub-perfect products could sink the ship. Good luck.