need help locating parts

[camtobias]

I have a 2007 mustang gt, hotrod cams,BBK longtubes, BBK offroad x pipe, ported heads,ford racing intake with shelby gt500 throttle body,car runs really great but after a trip to the drag strip last year i'm looking for more power, car has 4;10 GEARS and aluminum driveshaft also....looking to buy a used supercharger ,i just recently retired and i am trying to get a small buisness started so moneys a little tight right now....anyhelp would be appreciated