Parametric Cable Grommet

I've not made or tested this yet. It is designed to be made in TPU and may well not work at all.

Cable grommet, made parametrically in freeCAD.

I'll probably end up buying one rather than working on this as they are so cheap and I know that will work (I've never tried printing TPU but have a reel waiting), but I've uploaded this in case I go that route.