I made this a little while ago as I was getting zaps to an old address, but just pushed up some changes. It's just a python script that queries all queries all online relays, identifies relays with old events, rebroadcasts the latest verified kind 0 event to those relays and reports the status of the rebroadcast.

Going to update it to make it a bot so people can update by DM'ing it

https://github.com/UTXOnly/metadata_updater