If it were me, I would find or make a hole saw larger then the metal tube in there and from the door edge, cut a new hole that is just big enough to take out the set screw and whatever it is in inside of in the wood. Then the lock will come out. You can then plug the hole with a maple dowel, drill it for a new threaded metal tube, or thread inserts for wood, (or drill and tap the hardwood itself for threads for a set screw) Since this is a part of the door that is not always visible nobody (maybe Kube or me) would probably ever notice it. It might even be covered with weather strip depending on the year.
Good luck!