The fobs should come with the kit. The only additional thing needed is the PATS bypass module.
By the way here is another one on ebay where you can see the two fobs are included and is considerably cheaper.
p.s. I have the install instructions in pdf form if you want to take a look at whats involved. They would need to be emailed though as it like 170 pages (covers a whole bunch of vehicles not just Expeditions )