I made a minor change to nicoko's camera cover ( https://www.thingiverse.com/thing:4706284/files ) that works with the ender 3 camera mount ( https://www.thingiverse.com/thing:3294512 ). I'll include the files here, thank you to Codemonkey1973 for the original bracket model!
Other models I found wouldn't fit the larger lens I have on my pi camera, the camera model is OV5647.
The author remixed this model.