Try
DogCamSport They do a load of cameras and mounts for Sports, cars and bikes. Give them a call they are very helpful and have been in the business years. I have had 2 bullet cameras from them for skiing, the one I still have is great, and charges from USB and is waterproof, good quality video and plenty of hours record time. Similar to this
BulletCam it is very flexible in its use.
