This is a simple HPM light switch panel. All of the other ones on here did not seem to mount correctly without the addition of double sided tape or blu-tac.
This is very close to a real HPM panel in dimensions and is ready to be remixed into whatevery you need.
Rotate 180 around the X or Y axis and print flat side down
Update - Version 2: Centered the Switch hole and modified the wall width.
Rotate 180 around the X or Y axis and print flat side down.
Be careful if you print using a brim, the overhang of the bevel can attach to the brim and need some cleaning up with a knife and sandpaper.