I have fixed a few with good results.
I turned them over so I could get the rivet to drop down through the handle as far as it would go and then jammed a straight pin in next to the rivet to hold it there.
Then flip it back over and press JB weld into the gap between the worn rivet end and the handle metal.
Let it sit overnight (with the pin still in the gap)
Been over a year now and it's still solid.
