Regarding plans of the America - I'm pretty sure there are a number of sets that are contemporary with the ship, if not the drawings from which she was actually built. It's been a long time since I've dug into this subject, but I do remember that there's a rather simplified sail plan, at least, in the library of the Mariners' Museum (my former employer) that was drawn when she was undergoing some sort of overhaul at the yard of none other than Donald McKay. I think there are others.
I also remember that George Campbell, who did the plans for the old Model Shipways kit, said that, on the basis of photographs, her sheer had changed considerably over the years. That makes sense. Hogging is a natural tendency in wood ships, and her scantlings presumably were relatively light. (She was designed for speed and nothing else - much less long-term durability.)
The Mariners' Museum has a number of artifacts associated with her. One of the neatest is a painted half model with a silver plate on the backboard indicating that it was presented by George Steers, the designer, to Queen Victoria. Another is the quarterdeck skylight. Shortly before I left the MM we did a temporary exhibition on the history of the America's Cup. The hinges on that skylight were missing; I got the job of driving around to various ship chandlers looking for replacements. I couldn't find any that would work; we ended up hiring a machine shop to make new ones.
A beautiful and interesting ship, and the Revell kit is pretty good. (It was one of the last sailing ships Revell of the US released.) And it looks like GMorrison's model is going to be a find one.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.