Hi Inj, I used some spare screws from a computer case to lift the Zero up then marked where the ports would be in the clear case it came in. Then I took a small drill bit to fashion openings:
At first I used some non-conductive foam to fill the gap but then i picked up some M3x6mm standoffs to lock the Zero in place.
For a relay board in the same project, I picked up some M3 screws, nuts & nylon spacers from the local hardware store to fix it in position.
Hope this helps!