Grabcad?
Does Manyfold support SVGs/etc? It seems awesome but it might be self-host only, not sure there are any public instances.
Makerworld? Bambu recently released their laser / 3D printer hybrid. Though I have no idea whether they require the files to be doable on their printer.
I'm pretty sure Bambu wants the files as sliced by Studio just like everything else there. They want the machine profiles for users to download and print. Right down to the color of the filaments for the FDM stuff.
Honestly I think this is a gap in the community.
They're more project focussed but you could consider https://hackster.io/ or https://hackaday.io/.
Maybe consider cross posting this question to an open hardware community? Such as !libre_hardware@lemmy.ml
(And ping me if you find one, I'm collecting open hardware websites)
3DPrinting
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