See if you can account for all the supercharger parts 1st, before pulling the engine out of the hull and apart. If you can find all the busted parts then you may be able to just put a fresh SC in it and go. You had that shop give you the parts they already found in the oil screens, right? How much did they find? Have you pulled the SC out to see what all it's missing? Needle bearings, spring washers, slip-washers? How badly did it self-destruct?
Lastly, was the engine run for very long after the SC came apart?
Taking the engine out and splitting it open isn't particulary a fun thing to do, but you will learn alot in the process if you have to do it.
- Michael