Actually, there are a number of inexpensive performance wheels available in the 17-18 lb. range, in 7.5" width or wider.
These have the correct bolt-pattern and offset, but the hub diameter will be larger than 56.6, so you will be lug-centric, rather than hub-centric. Also, they will typically have two sets of bolt holes, and will fit both 5x105mm and 5x110mm patterns.
Try Discount Tire or even eBay, rather than the Tire Rack - you'll find a number of choices.