Did anyone look further into the thought that it perhaps contains some original part(s), even just fragments, that were then cobbled together more recently? If they used some replica parts and perhaps even mistakenly used a replica as a reference, that would explain a lot. I know it seems to be a black or white debate about whether it's real or not, but it's a nagging thought that supposedly these experts deemed it genuine and that there's some mysterious information that was shared with the buyer that satisfied them as well. What if that info was that some of it's real but it was "seamlessly" (ha) restored to its original state using new parts? A little Bondo here and glue there...voila. I know restoration of antiques can be a touchy and even taboo subject, so I could see that being the case with props and entertainment memorabilia as well, hence the tight lips from all involved.
Just thinking out loud, really. My very first thought when I saw it was that this was a possibility but it was overcome by the evidence for fakery. But like I said, that nagging thought of, "Still, the experts liked it..." is hard to shake. Either there really was something they saw in it or we must conclude that it was all a made-up show, or at the very least they were all duped and we're the only ones smarter than them.