Tousley is going to be your best bet for OEM foglights. I believe they were $68 each plus shipping the last time I priced them last year...or something like that anyhow. I'm about to order a new set as mine met with a nasty demise thanks to a dump truck dumping gravel down the interstate.
Note though, Steve is out until next wednesday according to his forum section...so you will have to PM his assistant or call them directly.
got mine today for $55 dollars from westway ford. thats cost plus 10%. try steve at tousley ford. im sure hell give you close to the same discount. or pm me and i might be able to hook you up...