Mine also nearly fell apart a few months ago.
It is possible to repair the shifts.
I removed the insulating rubber holding the shift together so the stick became two pieces.
Then machined an aluminium knuckle to replace the shattered nylon knuckle.
The aluminium knuckle was then shrunk fit in place and the two halves of the stick bonded back together using two part urethane.
There are a few tricks but if you know a mate that is good with a lathe and on the ball it is repairable.