I’m afraid I have to abandon this path….. I got a 4mm aluminium plate and started to cut it but just realized don’t have the proper tools nor skills so can’t continue this way.
Final try would be to draw and print a 3D model and then cast it. I have the contacts for 3D printing and casting but no clue about 3D design. Can anyone recommend a free & easy software or give any hint?
Is there a Fab Lab near you? You might find a source of expertise and equipment there.