Same part.
No, not at all. The original trigger bar might work in a 2.0, but the loop would need to be cut off.
Why do you need one anyway...were you trying to modify the original? Go talk to your local gun store and ask if they have a Certified Gunsmith...if they do, I'll bet he can get one from S&W...should be around $50 bucks for parts and labor and lesson.