I figure this is a long shot, but here goes nothing:
I used to be a really active player on MC-Prisons, back when the prison was still almost entirely out of bedrock. I spent countless hours exploring and working my way through the ranks, eventually earning my freedom. The server was a ton of fun, and I've made countless memories with my friends on it.
Anyway, I am wondering if someone has a world download of the old map and I figured this would be the place to check. Please shoot me as message on here and we can work something out.