Hal 9000 said:

I did try to use the "Nooo" from the 2011 edition of Return Of The Jedi, but I couldn't make it work. The music was too powerful in the clip, and there's reverb of the existing "nooo" in most channels. I never really minded that moment too much, though it is cliche and un-Vader-like. What are ya gonna do?

The Japanese dub has Vader straight up yell instead of saying 'No'. The voice modulation makes it similar enough to James Earl Jones' voice. You could try that if you plan on making a revision.