159Ti - Driver side window regulator motor gear is busted

[MattK]

Hi all, just had the joy of winding down the driver's window and watching it slide further down into the door while the motor whirred trying to push it up. After a tricky disassembly in light rain, I was able to retrieve the window, but the regulator motor whirs without moving the window mounts, and on inspection the nylon gear that fits into the receiver on the cable mechanism is cracked through, so the shaft spins but doesn't turn the gear. I'm guessing I can't just replace the gear itself because it wouldn't be bonded to the shaft?
(edit) or maybe this? https://www.ebay.com.au/itm/225497622265

Any pointers or advice will be gratefully received.