I've been looking into getting one of these things printed up for a Cycliq Fly6 tail light camera:
Fly6 Rear Rack Mount by oddbot - Thingiverse
The Fly6 only comes with seatpost mounts, but I can't use that on my commuting/touring bike due to the bags I carry on my rear rack. I'm looking forward to seeing how it works out. Wave of the future!