Thank you Patcon and Namerow for your quick response. I agree that a rebuild of the original unit would be the preferred solution, and I certainly appreciate your confidence that mine is salvageable. I also agree that anytime you resort to a "re-manufactured" item, it's a crap shoot. The shop where I'm taking the booster was recommended by a fellow z enthusiast, so this challenge is nothing new to them and I hope they can handle mine. I also saw the Z Store option, but as usual with these projects, there are budget considerations, and spending $325 + on the booster will be an impact that I had not considered in my build plan, and I'd prefer to avoid if possible. The car is now at the beauty spa getting a complete body massage and face lift (speaking of budget impacts!), so I have time to resolve this before I get the car back and start the re-assembly. I'll let you know how it goes with the rebuild shop, and keep you posted on my progress.
Thanks again for taking the time to share your thoughts.