This was inspired by https://www.thingiverse.com/thing:2765984 That worked OK, but I didn't like the press-fit.
I designed a similar mount but with a split ring design that uses an M3x6 nut and bolt to tighten around the lens. This should also allow it to be used on lenses with a larger body.
It can be mounted with the cold-shoe overhang either facing the body or the lens. When facing the body, it doesn't obscure any of the zoom indications on the lens body.
3D Solutech PLA
The infill amount shouldn't matter, there's very little area for infill. If you use enough perimeters it should be mostly solid (I think I used 3).