I simply took lysie's awesome F1-5 GoPro mount and set it up to fit my Ready Made RC Goby 180. You can find the original file here: http://www.thingiverse.com/thing:1343748
Printed in Taulman 910 Nylon on my Printrbot Simple Metal.
Edit March 31, 2016 - I added a new 'case' for the Yi Action Camera - I think it works a little better than the flat face plate.
Edit May 14, 2016 - I put up a reinforced version (v2) of the mount, this should take a few more hits than the original