Well I can't tell you for sure but looking on google images and comparing a 13 mustang and a 12 Shelby the front looks identical except for a larger lower grill and the fogs of course. Looking at all the lines where the good meets the bumper on both they look identical. I saw what happened to your car man and that sucks. From the picture you posted it looks like your car is red candy is that correct? I may know where you can get a whole 2013 gt500 front in red candy.
My mistake I looked up the guys who had one but not a 100 percent sure where I saw that it was a red candy but they do have gt500 parts. They're a bit far from you but I think it would be worth your time to give them a call they may have your whole front fascia if you're looking to upgrade it to gt500. They are called rusty acres and they are here in Jacksonville Florida I know a bit far from you but just another option.