In what store do you think I can find a purple hippo keychain??? (urgent!)?

So yeah me and this girl are talking but last night I was with a friend acting stupid and I think she got mad at me. So I want to see if I can find a purple-hippo (inside joke between me and her) keychain to apologize. Nothing extravagant, I know, but at least is a nice little detail that I'm sure will cheer her up.