It’s been a while since I’ve updated this, but I’ve switched over to a new GoPro mount.
You can pick these up at Unanistan.com
After extensive use with the last mount I found it much too fragile and brittle. I probably replaced it about 4 times since I’ve had it. This new one, designed and manufacturer by Unanistan has a much more rigid design. All mask mounts are now being printed at ultra high def – 0.1mm layer height (100 microns) making it incredibly strong.