I designed a "Bring Your Own Case" Stand for a Raspberry Pi and RPI Camera, where you keep whatever your preferred case might be and just slide it into the stand.
I took this approach so that it is more of a universal fit for various RPI models and so that you can continue to use your favorite case.
This is so that we can upgrade our RPI 3B+ #OctoPrint units to RPI 4 units. With the RPI 3B+'s, we had an all-in-one case with camera holder someone else designed but it didn't work for the RPI 4, so I made my own solution. You can find the part on Thingiverse, just look for my content under user AEtherScythe or just click the link.