I can get the bullet cams here for around the 130pounds mark. A couple of guys in the skyline club have bought them from here and have recorded some good track stuff. They normally mount them on their passenger side sunvisor.

We used a different style one at a track recently that was a suction cup onto the rear screen with 3 legs that sit on the parcel shelf. There is a screw that goes into the base of the digi cam to hold it firm. Not sure the make or price of that one but could find it out if anyone is interested. We had an awesome night reviewing the footage from it as it was very steady and crystal clear.