The Sony Action Cam comes with a nice waterproof case that can be tripod mounted but the case blocks all the sound so if you want good sound with your video you have to hold the camera by hand. To fix this I designed this 3D printable tripod mount. It should work in most tripod quick releases.
Print it out. I used PLA and support and it turned out well. Be careful when removing the support as there are some small bits you could break.