supercharger on 02 suburban

hey guys bought a 02 z71 with 30k , has a whipple supercharger  nice clean truck drove out of auction all is good as time went on i noticed a grinding noise that i felt through the pedal.  long story short i come to find out that it is the supercharger puting out this noise and that the bearings are going or gone ,, what do i do , i have the option of returning the truck and walking away, I have been told these cant be rebuilt that you have to buyu a new bolt on , I cant believe these cant be rebuilt someone have a clue please advise thanks

I WOULD SAY TAKE IT BACK .IF YOU LIKE THE TRUCK TELL THEM TO FIX IT OR WALK AWAY.