I have a side button underlever with the double sear trigger that's "broken". I realise someone might say unit might differ model to model?? Don't have serial or exact version info to hand right now.
How impossible would it be to find the parts I need?
It's away at repair at the moment so I don't know exactly what's been found to be the issue, but in short if I can find the complete unit to buy or equally difficult, borrow one to disassemble and copy. I have a skilled guy who will make a replica part from a pattern.
Equally a dimensional blueprint would probably work for him.

More info to follow when I've been to see the diagnosis but clearly going to be in need of the sear/trigger unit, ideally to copy and return.

Yours, probably up the creek
Steve