Deb - I would first try a local wheel repair place. That way you don't have to pay the shipping. If that doesn't pan out (Ihate to do this to you) type in Chrome wheels in the search and there will be a bunch of posts on the subject with companies that do this. The standard procedure seems to be you send them your wheels and for anywhere from 600-800$ you get a set of chrome stock wheels back with caps. I would also suggest you try E-bay as they pop up there from time to time. I still have my stock wheels in the garage and I'm toying with the idea of going that route. I'd try local first.
Good luck.