says mustang, but I believe we have same bolt pattern. I have pp, and the previous owner was kind enough to leave me a piece of styrofoam.
http://www.ebay.com/itm/2011-2015-MUSTANG-GT-SPARE-WHEEL-TIRE-DONUT-155-60-18-18-ALLOY-/252028515952?hash=item3aae11f670&vxp=mtr
http://www.ebay.com/itm/2011-2015-MUSTANG-GT-SPARE-WHEEL-TIRE-DONUT-155-60-18-18-ALLOY-/252028515952?hash=item3aae11f670&vxp=mtr