Best option is to ignore Chris, nobody likes him anyway

lol. Joking Chris.
You
can gain access to the For Sale sections through either Rodeobob or wedgenut - you are at their mercy. Explain your story to them and why you want access to the section. I see your reason as valid, and as you already
have the Piazza in your hands i dont see you as a threat to other Piazzas out there [ie. youd have no reason to look for more Piazzas as you already have one, if you were inclined to strip it you could already do so]. I know it seems like an unfair system but its just to stop us from being flooded with Gemini owners that are after our drivelines. You dont seem to be one of them.
Now, what is it you are actually after? Info? Parts? Etc etc. I see parts being the only problem [that is until you are given access]. If there is anything you are urgently after you could try post in the Gemini owners section and someone will forward stuff off to you.
Finally, some pics in the showroom section along with your plans, and a post in the introduction section will not only help you bump your post count up but let us get to know you.
Cheers,
Nick-
PS. I was once in your shoes.