UNDO Message Editing

[Carpesimia]

I have an issue with members editing old posts and setting the values to something like ".". Its a long story how we got here, and I cant really get into it, but im looking for a way to undo message edits, by user and date hopefully.

Im currently browsing through all of the mods looking for something now, but nothing yet, so i figured i would take a break and post this before going back to my searching.

I've already set the days to edit down to 7 days, but moderators (yes, even need to watch my mods) can still edit posts, and i need to safeguard myself against them as well.

IS there ANYTHING out there that saves a backup as messages are edited, and allows a rollback to old versions?

Any help would be appreciated!