I bought the wrong size case and wound up needing to mount the PSU externally. I didn't want any exposed wires though so I whipped up this cover to keep the install looking clean and safe.
Very much not optimized for printing, I wound up using a lot of support material and had the best results with PETG. It fits my 5v PSU perfectly though.
The author remixed this model.
this has been elarged to fit all connections, a circular hole to route the wires to the side, has some additional bracing for strength and beefier slot holds.