I'm also very interested in the flip hat. I have four fire walls, I bought (I think) 3 churro carts, and have multiples of the rest of the hats.
I could get you every type of hat if that's what you want. Name your price. Message me if you want.
I want to keep things reasonable though just because I think it's rather likely that the flip hat will be put back in the game at some point.