You need the 99/01 cobra fogs. The 03/04 the buckets and bezels are completely different. I had to swap to the 03/04 lights, buckets and bezels when I swapped to the 03/04 bumper. But if you can find an aftermarket that's the same diameter then that will work as well. You'll just have to mount it some how. Best bet would be online since you want halo fog lights.
1999 Cobra black with medium parchment interiorJLT CAI, RWR motorsports tune, Pacesetter Longtubes, o/r xpipe w/cutouts, Flowmaster Super 44s, built t56, Kevlar clutch, Nitto NT05R, Ford Racing 4.10 gears, MMR 900 rotating assembly, vortech v3 si, twin aeromotive 340s, aeroquip lines, 80lbs injectors