You could also try using some Tenacious in your SLA mix. I've had really good success with all of the Siraya Tech resins.
https://siraya.tech/products/tenacious-by-siraya-tech-for-lcd-resin-printers-1kg
Yeah, I don't think I have a Thoren, but I did pick up a larger 1/48 scale version of the original Takara kit.
I went a little crazy and bought multiples of either the Robotech versions, or the original source kits.
I'm pretty sure I have one (if not more) of these lying around. I went through the same thing a couple years back . Let me poke around when I get home today and see if I can find it for you.
I think that's an awesome idea. I've always wanted a 3D printer, but they're just too cost prohibitive for a single person. I know I'd be willing to create some models if there was an avenue to have them printed.