There are 2 snout bearings, 2 front rotor bearings, and 2 rear rotor bearings. Almost certainly, one of them is locked up.
The cheapest and fastest route would be to swap in a used supercharger. It is possible to rebuild the blower, but it will take some time and costs up to $500. (Still cheaper than buying a new one.) The downside to swapping in a used one is that it will have high miles.
If you are going to pay for labor to have the blower installed, then the cost difference between a used blower and a fully rebuilt one is less significant, in my opinion.
