Last year I posted about this HERE

Well here I am now a year later wanting it out now for sure as it has a miss on that cylinder.  This old truck doesn't get used much hauls fuel and tools in the summer months lucky if it gets 2000 miles a year.  I went to take the plug out today or break it and the darn thing is rounded off now.  As in the socket spins on it now.  Anyone got a suggestion as next thing I was gonna hammer on another smaller 12 point socket or something and see what happens.  IS there a tool or something for this?  This is not the split plug style the newer ones had. Just a plain old plug stuck in an aluminum head.