I printed this case with Durabio for the first 3 layers. Then I switched to Black PETG. I have uploaded the STEP file. You can edit it to suit your needs.
The Coverter i used:
AliExpress ¦ Buck Converter DC-DC LM2596 DC 4,0-40 → 1,3-37V
The author marked this model as their own original creation.