What are they called?
#1
#2
Sounds like a dealer only item. I looked at ftepartsguy.com and it looks like the parts you're talking about aren't even labeled.
Th!nk Parts Guy
Th!nk Parts Guy
#4
They are the (we call them) "Pop Rivets" at our shop...Same style, yet different finish (matte) as the ones that hold the upper radiator cowling on. You pop it up as far as it can go, and then pull the entire plug out. Pull one and take it Ford, or maybe even Carquest...NAPA should have them.