Chris,
I've since rethought the gopro mount but can still make you one if you'd like. The problem ended up being the mounted base that goes on the car. I didn't want to model in and include a nut holder/screw like real go-pro mounts have. Laziness?
However I do have a model for the top part (as seen in the pictures above) that I can send you if you'd prefer, it fits a standard gopro base mount just fine, but I ended up not modeling the base and screw set up that it would attach to. Since this is/was originally made for my own use, I thought I'd prefer that way but after my first few test prints I ended up going with a solid base mount which I finished the other day but can't print right now due to 3D printer issues that I've ordered parts to fix.
I will attach new pictures of the solid base today during some free-time from my normal work schedule.