Air Conditioning Seal

[Mr3Speed]

Air conditioning seals, I’ve seen a BUNCH of posts and threads about Vintage Air. I’m wondering about complete factory AC restore. I have my AC torn apart on a 69 c10 AC cab. There’s one seal I can’t figure out. It’s foam that looks like it staples to a metal flap. It’s used to divert air to your feet or the center vent. I can’t see a way to undo the staples to get the foam out. I also can’t imagine a way to get the new foam on. Any information is helpful.