I had Smith Enterprises do the full treatment to one of my Garand trigger groups. While I have NOS to chose from, I actually used a Norinco hammer and trigger because the parts were to be re-heat treated anyways (my assesment is good steel but poor original factory heat treatment).
If you are not having a heat treatment done as part of a trigger job, I strongly recommend the BM59 trigger as a starting point - these were used in automatic mode as well; consequently, the sear is a much beefier part.
Before doing a trigger job, I would also suggest purchasing an SEI trigger pin/spring kit and seeing how you like the results first.
I think that I may have a spare BM59 trigger assembly kicking around, so PM me if you're interest... ...I'll see if I've got a pic kicking around and, if so, will post.
R