I have to echo the sentiments of others in saying that I managed to gain this cheev naturally before the end of Act II just by playing the game and checking every loot box.
As of 4/28/14 my Borderlands 2 trading post is officially closed. I am no longer boosting, trading, farming, etc on the Xbox360. I am entirely on the Xbox One now. If you want to play Xbox One with me, send a friend request with a message
to GT zI Drucifer Iz (those are capital I's).