Wall-mounted power brick holder

I created this wall-mounted power brick holder for a 48V power supply for a PoE switch for some security cameras. It will live on the OSB-covered wall of my garage, so a screwed-on holder was preferable to using double-faced tape or some other mounting strips. This way, if I need to replace the brick, I can simply drop a new one in.

The bottom of the holder is designed to allow entry of a standard C14 power plug (centered), while the other end is wide open. The holder is not intended to fully enclose the power brick. In my setup, about 40% of the upper end of the brick will be exposed.

The brick in question has the following dimensions (in millimeters):

Length: 133
Width: 51
Depth: 33

If your brick is a different size, you can resize this model in your slicer without too much trouble. That being said, if you change the dimensions too much, you risk distorting the screw holes to the point that they won't be useful to you. If you need something drastically different, cons