i want to put a cold air intake system in my 97 mustang GT

but need help finding one. 

i also want to know what other things i might need to make my mustang run the way it did almost 10 years ago.

If you read mmff just look up all of the Red Headed Step Child Project articles, they did a nice job of going over non PI 4.6's.  I would say do rear gears, full exhaust (ditch the cats if you can), underdrive pulleys, elbow and throttle body and then cams if possible and a computer tune.  I was personally amazed at how much they gained by swaping the cams out even on non PI heads.  Of course the quick way for power is always with a turbo or blower but not every one has $3500+ to drop all at once.  Good luck and have fun.