There didn't seem to be any 3d printable cases for the PETSD+ so I threw this one together... it's not the best but the only other one out there i could find was one you had to buy. This one handles all the buttons and an IEC port (if for whatever reason someone added one of those). I also tried to make the parts have enough clearance for printers that aren't perfect. I don't really know how best to make a closable case that you can screw shut or whatever so this one the lid just sits on top, so you might want to put a dab of superglue or whatever on top to hold it... or maybe someone wants to remix this and make improvements.

Link for site with the gerbers/build instructions/etc. https://petsd.net/