There isn't an aftermarket one, you have to find a pull off. 99/01s aren't exactly common to begin with, wrecks are even less and nobody with a good car is going to pull off that bumper and sell it to you. Gotta wait for a part out and hope you are the first one in line because I guarandamntee you you'll either pay a ****load on ebay for one or someone will snipe an online posting for one within about 10 minutse of it going up...
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.