hey guys i just found a great website for aftermarket rims

http://www.cwdwheels.com/?s_kwcid=rims|1030578736&gclid=CNDK4sf8g5QCFSQqagodvC9LVw

this website has a lot of wheels and gurantees they will fit your car or your money back. They also do free mounting & balancing with any wheel & tire package

Actually, there are two sites that are way better:

Super Buy Tires (http://superbuytires.com/)

and

10-10-Tires (http://www.1010tires.com/wheels.asp)

For both of those sites you will not be able to choose the G8 as it is not in their database yet; you will have to select your wheels manually (5x120 bolt pattern, 35-50 offset, choose desired wheel width, etc.)