Chop the lower portion (or top), grind inside the bracket down to bare metal, grind the handlepole down to bare fiberglass/smc/frp/whatever it is, reattach with generous amounts of J-B Weld and rivets. I did mine years ago, even redid it to shorten it some more, and it's solid still. The J-B keeps the rivets from loosening, and is really what holds together anyway.