I designed these super sturdy 15mm and 22mm bar mounts to be use on any of the standard camera mounts like GoPro, Armor X and Tomtom use on their products.
It's a slim but strong design with a flexing compliant hinge, witch has grooves so that 2mm O-rings can be used for extra grip. Cutting an O-ring open and placing it in the printed model works great.

I did design this to be used with 3x M5 (M5 X D7.5 X L4.5) threaded inserts, link:
https://nl.aliexpress.com/item/4000714647062.html?spm=a2g0s.9042311.0.0.27424c4dZHK7j5

Just push them in with a soldering iron.

I recommend using PET-G or even better Poly carbonate for this print, i recommend these materials for this application due to it's strength and flexibility. Some flexibility is needed in order for the hinge to work.

Don't forget to post a make and give this model a rating, I love seeing those!