You want to look at proven clutch manufacturers for the Mustang.
McLeod probably being one of the best you can get. I use SPEC and love it. RAM, Centerforce, Fidanza, are all top of the line. Most importantly, you will get with the kit and install no matter what the throw out bearing and pilot bearing provided.
I was fortunate enough to also get a SPEC flywheel to put in same time. Very nice set up.
Try adjusting your clutch until it's replaced. Place your foot or hand underneath and pull upwards to self adjust. Good luck.
'97 3.8 Pacific Green
1996 SVT COBRA