Garry,
I'm not sure if this will help you or not, but I just received a set of OEM 18" Chrysler 300C ('take-offs') which I purchased on eBay for $849 (w/ 'free shipping') from San Diego, CA. The eBay Seller's ID is WheelsForCheap and the contact there is a nice gentleman by the name of Elias Mendoza. His e-mail address is
Wheels123@cox.net
My wheels came via a 22" Chrysler 300C custom wheel 'change-over' which he did for one of his customers, so he evidently does operate a tire/wheel business somewhere in the San Diego area. He currently has several sets of take-offs for sale on eBay and if you were to contact him (via e-mail), I'm sure that he could provide you with his business address.
I just finished having these tires/wheels re-balanced (just for my own 'peace of mind') and mounted onto my '300 Touring'. The tires, wheels, and center caps are all in 'mint' condition and I am very pleased that I made the purchase. Besides providing great communication (w/ UPS tracking numbers) throughout the transaction, Mr. Mendoza appears to be a very honest individual. You might want to give him a try, and tell him that you got his e-mail address from the guy he just sold the 300C 'take-offs' to...it couldn't hurt. Good luck with locating your wheels and take care.