I created this because the one hole provided on the camera would not be enough for mounting it to the ceiling (could also be used on a wall or desktop) for maximum coverage in our RV.  This holds it fairly tightly, probably going to add a small piece of nano tape just so it doesn't wiggle out since it is in our RV, in a house it should stay put no problem.

Printed 0.3mm PLA, takes just over an hour, no supports needed.