I bought a cheap USB camera from Amazon for around £5 which works on the Anycubic Kobra 2 Pro (and others) printer.   You can see it online here on my Amazon affiliate link, its available from Aliexpress too for around the same price, but slower delivery of course.

I didn't want a camera that got in the way of operating my 3d printer, or put any kind of additional weight on the z axis, so this model allows you to move the camera to the best position for viewing.  You can choose from two enclosures depending on the angle you prefer.

All can be printed as they are laid out in the STL files without any supports, however the one exception is the angled camera enclosure which needs a small amount of support under the angled mount.

Print the stem with a good wide raft, or lay on its side and use supports if you have a problem.

I dislike additional fixings, so everything is push fit, no other hardware required.