my 2011 has it stock. right at the bottom of the center stack on the dash there are two button like areas on either side of a little cubby, one is the traction control off button the other is the aux jack right above the gear lever. maybe you can find that part at a junkyard and swap it in? sorry i dont have more info handy for you.
----------
quick google search gave me that^ you can see under the HVAC controls the panel that houses the aux input and the traction control button