@Proffessor_Oak Ghaz'rooki is being converted to a rare drop. Not sure about the boxing gloves yet.- Cory Stockton (@mumper) July 9, 2013
Its definitely good to know that Gahz'rooki will be sticking around, albeit as a rare drop. We don't know where it'll drop or how rare it'll be, so farm the pet now while it can be traded for a Radical Mojo.
As for the quartermaster's other Battlefield Barrens-themed items, like Griftah's Authentic Troll Shoes, we're assuming that they'll disappear along with the event once the patch hits. Purchase them now while you can!