I called Crutchfield, where I purchased my head unit and components, and the rep offered me an adapter for the steering wheel, which it doesnt have. Just know, the cost was around $70 for the adapter alone. Whether your local stereo installer has or can get one, Id be suprised if they didnt have it or couldnt order it within a day, IF its available for your model.
crutchfield dot com
hope that helped.