This site B. Hague & Co. Ltd Car Mounts & Suction Pads has a good selection of car mounts for fixing camera and camcorders to vehicles or this site MountingClamps
Just found some footage from his mount.
See if this is what you are after...
YouTube- whaddonoctober09 Kai
that looks fantastic! I was hoping to not have to bolt into my dashboard, but it looks like it might be my only option.
I ordered the grab-handle mount despite not having a grab handle in the hope that i could find something else to clamp it to, but the only thing in the right place is the hood over the dials, and that's certainly not sturdy enough to take even my iPhone on a mount, let alone a DSLR!
I still need to try the tripod on the back seat & floor behind the front seats, tied across to all 4 headrests, but that's one hell of a lot of effort every time I want to take it in or out!
As for making something myself, I have neither the skills or the tools, sadly...
So this dashboard mount you speak of is basically some sheet metal with a downward-facing lip along one edge. This lip then goes between the dashboard and the windscreen and the bottom of covered in velcro. Onto this platform you can then bolt whatever you like of course - camera tripod thread, etc, etc...
is that right?