I got mine at Advance Auto. They were $20.00. The only problem is, that I have the Cobra bumper and Cobra R hood because I hit a deer doing 70 a couple months ago. It's in the threads below under "got myself an 8 point buck." It was ugly, but several upgrades later, and the guy who did the work was also a Mustang guy so he took good care of me. The only thing he didn't do was the fogs, so I actually had to go out and buy them even though he fixed the car, upgraded the hood and bumper, lights, and did some extra dings and niks in the paint all around the car,
and ate the cost of my deductible. Could you believe it? Oh yeah, the venison was good too.....
I would say to measure up your fogs then go there to see what they have for options. In my case, the larger fogs look better, and the small ones look ricey.....