I needed a cover for my light switch because I didn't want people turning off my Hue smart lights from the power switch. I also however wanted to retain side access just in case. So I remixed this design, the only changes is the hole in one side for the aforementioned side access.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/lxrtju9zf0p