I didn't find quite what I needed so created my own...

This is to cover a light switch or in my case a fused spur switch. Where the switch is still accessible, but to avoid the switch being operated unintentionally.

Low profile compared to others I have seen and tried but similar logic.

The screw hole is countersunk, 4mm profile with a larger 8mm profile for the protecting cap.

I printed face up and with support under the switch guard to get the nicest finish on the exposed surfaces.