Question for the OP .. I noticed your profile says your up in the Yukon. It may or may not be relevant, but how cold was it at the time your trigger broke?
I decided to look at my SR22 and it has a plastic trigger of all things, and was thinking that it wouldn't be that great in cold weather. I ordered a Timney trigger set up from mystic as replacement. I use mine daily in the mornings when I take walk looking for partridge to shoot, and it's getting rather cold now a days ... lol. I'd hate to have it break on me while I am waiting for my new one.