I would honestly look into getting some OEM take-offs from a higher trim level. There are likely aftermarket wheels that can be found within that price range but OEM wheels would be higher quality and there always seems to be a few sets for sale.
You have the 15" wheels? Like twenty said, look for someone wanting to get rid of a set of 16" OEM wheels. Check the market place column. I sold my OEM 16" wheels with tires to a FF member & bought my OEM 17" wheels with tires from an FF member. Also check out Ebay. I've gotten wheel and tire sets in excellent condition before. Just have to really make sure the seller has a good description and that the wheels don't have curb rash.