Below is a pic, credit to Crash shop-out gallery. The part in the manual is 515-5044-01, but be careful searching as it can bring up a different part used on Batman and others. I'm not surprised it breaks as on multiball it must kick 3 balls up the lane!
Not this - https://www.marcospecialties.com/pinball-parts/515-5044-01
This (I think!) - https://www.marcospecialties.com/pinball-parts/515-5044-00