I tried to find a housing for the module, but without success. Based on a simple parametric housing with latches, I present my first project.
Module available Ali when searching "QC4.0 QC3.0 1 Way USB Type-C Mobile Phone Quick Charge Adapter 6-35V Step Down Buck Boost Module SW3516": , PCB size 50x20 (mine 50 x 19.2), unfortunately there is very little flat space at the bottom of the PCB, not to mention the lack of mounting holes. On the other side of the USB A&C, a DC power socket 5.5x2.1mm. Remember, there is little space: first solder the wire flat from the top (do not thread the wire through the hole in the PCB), then solder the wires to the DC socket, then the nut. A few photos from my first version. Good luck.
I made it with PLA (sure PET-G will be fine too), 3 walls, 3 top/bootom, infill 30% works for me (photos). I use Ender 3 v2 (at 45mm/s)
The author marked this model as their own original creation.