I know its probably a little late, but I wanted to put the word out about a great company that rebuilds superchargers for our cars. The company is Performance Solutions Engineering and is owned by Ed Martinez out of California.
When I first purchased my '94 Ultra it had 138K miles on it and I hadn't noticed the nose-drive was leaking SC oil. Anyway, I did some research and came to find PSE. They offer a 3-year, no questions asked, unlimited mileage warranty on superchargers rebuilt for our cars. The only downside is the price tag, I paid $800.00 for the unit and there was a $350.00 core charge if I didn't want to send mine in, or if the one I sent was junk.
Later on, I came to find out I probably only needed a nose-drive replacement, which sounds like what Doc needs, but who knows. I believe the nose-drive replacements run about $300.00.
A few days after I ordered, my package arrived with all the gaskets needed (yea you have to pay for them, but he gets GM gaskets for cheaper prices). A friend and I swapped the SC out in no time, dropped it back in the box and sent it back to California. After the turnaround time I had my $350.00 check in hand for the core, and after putting 3,000 hard-driven miles on it I still have no complaints.
Ed is a great guy, and very knowledgable about the processes of rebuilding SC'*, and he seems to be a very meticulous individual. I had also talked to him about performance solutions for our cars. At the time he offered a port job on the SC, along with an FMU that would add an additional 30hp to a stock setup. The price tag on the upgrade was $500.00 extra I believe.
Hopefully this will help anyone looking for a rebuild in the future, just thought I would pass along the info. In addition, Doc, great work on all your dedication to the Series I engine. I am dying to mod my Park Avenue, but alas have had no luck in finding any performance goodies, that'* how I wound up here.
And lastly, I want to comment on the forum you guys have going, seems like a great bunch of guys all in love with their cars, its good to see. Catch you all later.