A simple case that is sized to fit on the case bottom threaded holes, and contains a pair of DC-DC convertor modules (LM2596's)
This allows me to run power from the PSU at 24v, and then send 12v to my light bar and 5v to the raspberry PI running octoprint / octodash. Everything then powers on once the printer is turned on.
Easy print - no supports required. I used .3 layer height and 15% infill (but in truth that really doesn't matter as most of it is solid anyway). I used the clear no-name PETG I had loaded, with the Prusament PETG profile in PrusaSlicer.
Obviously you will need two DC modules, but also 3 power jacks and sockets to run power to and from it. I made everything centre positive to make it easy to remember.
Everything is mounted with M3 screws - 5mm for the lid and the DC boards, 8mm plus washer to attach the case to the bottom of the enclosure. All of these I had spare from building the enclosure.
[edit - 5A XL4005 DC-DC converters also fit as they have the same hole spacing and overall size. I switched to one on the 5v side to provide more power to the Pi]
My other Prusa enclosure prints:
https://www.printables.com/model/563199-octopi-mount-for-prusa-enclosure
https://www.printables.com/model/485262-led-light-bar-for-prusa-enclosure
The author marked this model as their own original creation.