I'm pretty sure I've seen them somewhere, is there a way to get a steering wheel with button on the steering wheel that control your gps/stereo system. Like a next track, pause, mute button etc.

Would be nice

You need one of these:
http://www.crutchfield.com/S-mdBnv48BQt ... i=127SWIPS

What kind of car?

Yah, go to www.pac-audio.com (it might be .net) and make sure that your car is on the list of vehicles that this works with.... it does work with most.