I get my MotorCraft Fuel Filters from Advance Auto Parts, I think they are $45 and that is both the Primary, Secondary and new O-Rings for both lids......
I agree with the other's a few more bucks on the MotorCraft ones is worth it..... I run only MotorCraft Fuel and Oil Filters..... Alot of the off the shelf ones leave something to be desired..... The someone changed the oil in mine before I go it and used one of the filters that are a 2-piece unit with a filter and seperate "adapter" that snapped into the lid of the housing..... that went away real quick, for a MotorCraft......
That reminds me, I need to pick some up and change mine.......