I know I'm not suppose to do this but I have a set of 18" Expy wheels and tires with TPMS installed off my 07 Expy, less then 10K miles on the Michelin's.

I have them on eBay, if interested and if I don't get deleted reply back and I'll post the link.
Or seach under 18" ford expedition wheels they will be listed at $650 with a BIN price of $750 form Lexington, Ky that way you'll know its the right set.