The best thing possible would be the SAGA, but with
1. all scenes uncut (so no "stick in his hands)
2. all other deleted scenes possible
3. GF III

Btw Turnbull, we already have a killing of Fabrizio in the Saga (when he enters his car), so the scene where Michael kills him with a lupara can never appear in the movie. Unless as an extra, but not on the place where it should be. If you get what I mean...