You can use almost any stereo with your steering wheel interface. If your radio uses an IR remote, which most do these days, you can get the SWI-X, which transmits IR commands to radio simulating the remote.
I used to have that, but I have a jack on the back of my Alpine for the steering wheel input, so I use the SWI-ALP..
You can find them here
http://www.pac-audio.com/produ...rface
And it seems the SWI-ALP that I use has been replaced by the SWI-JACK which does more radios.
It's a bit of splicing into the factory controls, but it's quite easy to do.
Also, PAC have lots of other neat gadgets on their site.