A quite universal (requires 4xM4x10 bolts and 4xM4 screws) mount for Meanwell-LRS-350 series PSU. Holding screws are hidden within the mount for hers&your pleasure (aesthetic lvl over 9000) in a pocket slanted 40 degrees.
I'd suggest at least PETG for the print, since the PSU enclosure sinks some heat, but if you're feeling frisky PLA might be okay.
Suggested order of operations
The author marked this model as their own original creation. Imported from Thingiverse.