I have torn down the engine of this 1987 motor scooter due to a mechanical rattle, and found that the water pump shaft is broken. I tried to buy one at the Honda dealer but it has been discontinued. The part number is 19231-kj9-010. A picture is attached of the broken one. It is 101 mm long. Can anyone help me?

 

The "related topics" below are not related. This is about a motor scooter, not a car.