OK, brief update here. I am talking with Ed, the "quality superchargers" guy on ebay. And I spoke with Superchargers Online, a Simi Valley company that sells parts online, and also has a shop. There are several routes to take on this project. Basically, the coupler is the part that fails.
http://www.superchargersonline.com/...&id=57&zenid=e79410cf85ff97a79d5d19e29d7f43d0
It's made with springs to dampen vibration to/from the engine. those springs break, and the solution for longevity is to replace the coupler with a solid unit, as shown above. Now the obvious question is given the PITA to take the snout of the S/C off, as detailed in that Jagforum post above, What else should be done while you are in there? Superchargersonline said that basically, the couplers go early, 40-75k a lot of times, and that around 100k miles the snout bearings will go too. Which means that it may be worth my while to do those as well. They also said that these units are not rated past 125k, and that after 100k they would generally do a vane replacement and rebuild the unit including all bearings and "wearables."
They quoted me around $4-500ish to do the coupler and snout bearings. then $750 for the whole supercharger bearing overhaul. Then around $1600 to do a full rebuild with new vanes, etc. which would basically be a new unit.
Now i can also order a rebuilt snout from ebay for $400ish. that has new coupler, bearings, gasket, etc. then have my guy do the install.
Thoughts on which route to go?
There is also the other option which i am of course investigating - Quality superchargers has a "performance" pulley upgrade, which gets about 7% more power by changing out the Snout Pulley. I have already done the VELOCITY AP crank pulley and tune, so it's pushing 450hp at the moment. Not sure if it can happen, but I wouldn't mind another 30HP if possible.