Listed as part #04-10320 on Marco's, and possibly incorrectly as A-20739 on BAA.
Out of stock here:
http://www.marcospecialties.com/pinball-parts/04-10320
Any info appreciated!
Mine snapped when i loaned the game to a show for charity this weekend. Going to weld the original, but it'd be good to know i can buy a new one if required.