I have used their mounts for my cars for years, but when I upgraded from the OG Droid to the Rezound they did not carry a mount for it. I sent them a email and got a responce saying that they would email me as soon as they had them in stock. They are not cheap, but I have found that they meet and exceed my needs. This is just the device side, you would also need the vehicle mount side.
HTC Mounts
HTC Mounts
