Recreated the GoPro MP Select Mini mount by tsmooth3 to give a little more clearance for the bed belt to allow the mounting plate to sit flat against the print bed frame. This along with some extra thickness around the mount point provides additional stability to reduce bouncing of the camera during fast printing.
Printing orientation is upside-down from mounting orientation. May be able to print right-side-up for a better looking "top". Results may vary.
Recreated from scratch in SketchUp.
Source .skp is included for anyone else to modify.