I saw this online blogshop called MockingjaySG
they have this pre order for the pins and they got alot of other merchandise too!
i actually wanted to order from amazon. but the shipping is crazy so i ordered from them.
its the neca pin and its so prettttttty!! gosh hahaha like the one in the movie ^^
well just check them out price is reasonable to me

http://mockingjaysg.blogspot.com

they mentioned it once when they were counting whoes left alive haha. just a brief moment if i remember correctly.
but i agree dont think anyone who didnt read the book would know that girl is foxface.