If you are in alpharetta area try America's Best automotive, It near the ferrari dealership right across from the Auto Brite carwash, There was always an aston martin or ferrari when my car was up there.

Another place is perfect performance, It's off HWY 9 headed towards roswell. They do good work too and I'm pretty sure that they can do what you want. When i was getting my alignment, I believe that they put some 20's on a gallardo.