I've put a couple of things on Thingiverse, including a lens mount design: https://support.thingiverse.com/thing:330812 https://support.thingiverse.com/thing:3

I've put a couple of things on Thingiverse, including a lens mount design: https://support.thingiverse.com/thing:330812 https://support.thingiverse.com/thing:330812 Someday I need to clean up a bunch of other things and figure out what the cool kids are using to share designs instead of thingiverse now that Makerbot is kind of shunned by large portions of the open 3d printer community. I print parts for my cameras in ABS which is pretty strong and has a nice side benefit in that if it ever does fail, it fails in a slow stretchy sort of way as opposed to just exploding like PLA plastic does. I'm not sure what type of plastic the pieces you've held are but there's a really wide range of available materials ranging from really brittle to really strong (also with various degrees of heat tolerance in the end part). I've used the lens adapters quite extensively and haven't had anything fail yet and some of the lenses I use with them are large old lens designs from the late 70s which tend to be quite heavy.