I have been using a regular adjustable 3 leg tri pod. It fits very nicely in the back, with two legs on the floor, and one leg in the middle of the rear seat compartment. I secure the tri pod with three hold downs, the sides hooked to the seat belt slide rod on the floor, and the third to a hard point (child seat point) near the rear window. The camera is also tethered to one of the hard points near the rear window. This is very secure and provides for good video out the front.
Hope this will help.