I came across this design https://www.thingiverse.com/thing:4858394/remixes, but dint fit my nitrider cherrybomb 100 rear light. So I added a cylindrical post so most lights can be mounted. Printed in PETG.
Printer Brand:
Creality
Printer:
Ender 3
No
Supports:
Yes
.28
Infill:
30
The author marked this model as their own original creation. Imported from Thingiverse.