I got one but never put it on because it doesn't fit the '99-'01 Cobra bumper the way it does a GT.
If you get the ends flush to the fender well, the spoiler falls short of the front of the bumper by around 1"-2", leaving the spoiler hanging back behind the front of the bumper. Or you can get the spoiler flush with the front but fall short 1"-2" of the fender well.
I've gone through this before and they're are photos on this site, I'll find them.