Actually, just yesterday on another web message board someone was saying that they had bought one. I think they said they found it at Wal-Mart, but I would suggest checking a GameStop or other game store, since they would be much more likely to have game merchandise besides the games themselves.
I want one, too, but sadly the only thing around here is a retarded Wal-Mart, and no employee would have any idea what I was talking about...