I think I found a use for some of my old cameras. This has to be one of the simpliest mounts I have seen yet, and using a coupler to allow removal of the camera is nice too. Actually I am looking at this and thinking I could run power to the camera thru the pipe as well. Hummmm..
http://www.instructables.com/id/How-to-Make-a-Simple-PVC-Car-Camera-Mount-Rig/