hmm. Ausagi has a few "zombie getting shot" animations, but you're probably after humans getting shot.
I have been working on a lot of handgun-shooting animations myself, but haven't made many "reaction" anims, at least not for humans.
I could try make you one if you want? It might be a little stiff, but I could try. If you don't like it you don't have to use it. I've been experimenting a lot with custom animations this weekend anyway, lol