I have had excellent luck with Otis Inc. LA via eBay:
http://stores.ebay.com/Otis-Inc-LA. I would guess they have chrome, although I would strongly urge consideration of the color-matched wheel caps ($60). They are excellent and have been exact matches to our MB's (Black and Black Opal). They really emphasize the wheels, despite being stock, and give them a much sportier look. They only negative with Otis is that they have not provided eBay feedback on either of our two purchases, fyi.
