I've had replaced a cracked wheel and had my 21" chromed on both my MSs, and prior cars, and I always go through Green Tires in Hollywood - ask for Ron (owner) 800-548-5795. They are also known online/eBay, etc as Mr. Chrome, and ship all over the country. They have huge stock of Tesla core wheels for exchange, in every wheel model and finish, and sell individual or sets. Highly recommend them.