Is there any car docks that use Ipod direct?

Hello, i have a radio that has an ipod direct port and cable in my car, is there any car mount docks that have a data/power port on the bottom that can be tied into that? Would be nice tobe able to set the phone in the dock and not manually have to plug in the cable in and out of the iphone every time.

All the ones ive seen so far that have a port on the bottom are for power only, and usually plug into the cigarette lighter.

Thanks

[edit]
just found one that looks pretty good:
http://www.carcomm.nl/carcomm/produ...productId=3154B108-5056-8659-082A6E714542EC8D

cant find any other info on it through.