I've been scouring the interwebs myself for a couple years looking for the elusive Tron restrictor plate.
No way I'm paying a couple hundred for a full trigger stick on Ebay just for the plate!
No matter how cool it would be to have an original stick, just seems silly on a Mame setup for 1 game, even if it is my favorite!
Anyhoo, I'll keep looking and if I find one I'll let you know.
Perhaps even send it off to you for molding and have you ship it back.
But if you do ever sort one out, count me in for a plate!
Or a couple. For backup or just to say after years of searching I now have a bag of 'em, hahaha!