If your car is a GSX, I would imagine it came with 17 inch wheels. Try the wheel selection on Tire Rack.com. They have several vendors to choose from and they range from inexpensive to fairly expensive.

Also, you can just select your make and model and a lot of possible wheel combinations will pop up that will fit your bolt pattern.

Tirerack.com is a great place to get wheels and tires. You can even view the rims on your car! They don't offer all possible options of rims but they have a pretty good selection with decent prices. I got mine from there