So we almost have you convinced of welding in a patch. I did mine it was just like yours except mine only had one ear left. I bent the ear back in place. Straightened up and welded it. Then I cut a patch to fit the hole. At least I have the one hole to help make the other two holes for the original radio. Haven't bought one yet and haven't cut out the holes yet. I have very little welding experience except for restoring this truck. You can do it.
DSCN8670 by
bjohnson388, on Flickr
DSCN8671 by
bjohnson388, on Flickr
DSCN8687 by
bjohnson388, on Flickr