I realize this is a lot of work but thank you for doing this.

One shortcut you might want to use - for those pages that have been backed up already via the Wayback Machine, just create a browsable index and point to the archived versions. Fans did this for a Stargate SG1 archive that went offline. They then used AO3 bookmarking feature to index and tag the stories. You don't have to do anything that labor intensive - just a page with an index would be good.