Wow! Get on some Facebook groups specilaizing in guitar sales. Also a Google, or Duck Duck Go, search is your friend. You usually type in what you want and dozens if not hundreds of sites and threads pop up. There is a group for just about every type of musical instrument out there, so I'm sure just looking in the right place you will be fine. They would probably even have one in the year you are looking for. Facebook is pretty funny in that there is a group for just about ANYTHING wanted by ANYBODY! Just sign up, post what you want, and there you go. You can also post pictures of what you are looking for and say "This is what I want." Will probably have two dozen contacts within an hour or so. Ovations should be plentiful because as PA's started getting better, and better, the Ovations sounded worse and worse, so there are always some people looking to get rid of them. You can probably get some good deals on them. Might be able to get a couple.
Good luck.

MAB