Looking for M1927 A1 semi auto parts

Good afternoon all.

I have to repair a A/O Thompson 1927 A1 (NY Manufacture) semi auto rifle. It was literally delivered to me "assembled", but with a jammed bolt, and bags of parts. I was told something was wrong with it... well, after some research and finally getting the bolt freed and upper off, I learned the Trip (part #59 on original diagram) was broken in two. I've found Khar parts has one, but specifies it will only fit a MA manufactured rifle (the one in hand was made in NY). My go-to (Numrich) doesn't have it in stock. Anyone have any ideas where I may be able to get a replacement for this Trip, and possibly, other parts for this rifle?
Thanks all.