2008 grand prix ipod integration

I have a 2008 Grand Prix with a single disc cd player. It also has steering controls. It does have a cd/aux button. Where can I find an ipod kit that allows me to control my ipod from the head unit? I don't want and fm modulator or anything like that. I have read about a PAL from gm but I don't know where to find out if there is one made for my car. All of the iSimple kits I have seen don't list anything for the 2008.

Josh