One of my actors never got back to me about coming back to redub some of his lines. If he doesn't come back, should I try to find a person that imitate his voice or something like that? I basically need him to shout out one line and do some grunts and screams, during a fight scene. I hope I don't have to redub all his lines, and would like to find another solution. I hear that sometimes in movies you can manufacture words being said in certain cases. What should I do? Thanks.