Hmm, maybe Iago has some space on the Forum server for you? I know that involves moving, but it would be safe there from any further such things. Working through the wiki to restore the links would be a hassle, I grant you, but I bet there are some people willing to help around here.
Though shouldn't there be some way to export the wiki and import it again into a new wiki? Seems like that should be an option that exists.
Alternately, you could set up a Patreon for the wiki and see if people are willing to put some money together to keep the wiki up. It's not a perfect solution, but it's not exactly a perfect situation, either.