You could give Launch Helmet Cams ago
http://www.launchhelmetcams.com/
I have one and its performed perfectly.
I have it connected to a Sony handycam mini DV and this allows me to use
a LANC remote so I never have to access the handycam to pause or record,
the remote even turns the handycam on and off, all of these functions are a one button opperation.
The bullet camera is housed in an unbreakable billet alluminium mount, a must have if you plan to crash on it.
I keep the handycam in a Pelican case for protection, and this has saved it through many crashes.
Here's a photo off the LANC remote:
Here's a photo of the camera mount:
Heres a photo of the Pelican case:
