Good job in research. In California we are restricted for the most parts due to nut case stalkers. The incident that comes to mind was about actress Rebecca Schaeffer whose address was traced via the California DMV and she was murdered.
On the other hand, on two out of the three Mustangs I now own, I know of the original buyers, original dealerships, the second owners, and I'm the third. I have both of the original owners manuals and on my 65 GT Fastback, the original window sticker and sales invoice. On the other car, a 66 "K" Pony Fastback, the two previous owners and I all worked for the same company. You may have heard of it, Ford Aerospace and Communications Corp - AKA Philco and a bunch of other name changes. I still see that guy that sold me that car when he comes out of the rain soaked areas of Oregon to visit Northern Cal.
Jim