if you request a super duty brochure on fords website they will send you a PCO in the mail. I got mine randomly in the mail for 2k. Funny thing, it was actually in my father in laws name but they allowed me to use it as long as I had another piece of mail within the past month with his name on it with my address. LOL
Don't forget to slap that PCO down after you negotiate the price. PCO is hard cash that comes off the top which reduces your taxes paid and loan amount too.