Not so hard. Motec is a german manufactor for motorsport. They offer a few wheels for street legal use.
I tried to go for a OEM wheel setup. So my problem was, to get a 17x9 wheel for the rear. It's very difficult to get it in germany. Motec told me, they are able to made it in 17x9 for me, but I have to order 8 wheels. That's minimum. I decided to go with 18x9, cause they made it in this size for street legal use.
But I have to say, I'm very happy with it.