Free 

I created this to mount an Ground Loop Isolator/inline noise reducer.
Mounts to board via M3 screws. Use small ~2M self-tapping screw for retention strap.
I used this noise reducer, but there are many similar available:
https://amzn.to/43O0v5Z












Names are used only to indicate the source of a result. Polyzon is not affiliated with the listed sites.