You may be in for quite a search. They are no longer made, the ppl who do have them generally will not want to part with them and if they do you are going to have to pay a premium for them.
Also wanted ads belong in the classifieds...
I'd post up in the classifieds here, the corral, modded mustangs, stangnet and any other forums you belong to and see if anyone has one or two. Do NOT be picky as far as the color of them, grab whatever color comes up and worry about paint later.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.