Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5401633.

This is a remix from this: https://www.thingiverse.com/thing:5334319

I further reduced the height so it takes less time to print.

You could play with infill as I did but it might no be necesary.

Uses a M8 bolt with a washer at the screw hole that the original mount already has for attaching it on shafts.

Inside the original mount there is a metallic ring that you must be rotated or removed so the bolt goes through the opening without damaging the ring.