Great, I wish you luck with it. I realize it can seem like a lot of work to do this, but this seems like something all of you loved working on, so it would at least be able to survive in some way or other, and keep some of your users happy.

Even something as simple as a basic code dump (with whatever needs to be removed, removed) would be better than nothing. I'm sure you'd be able to find a steward in someone for this project.