I don't know that there were two hours of interview w/ Bunting, but as a
filmmaker I can say that in my experience that would be probable.
The Voices and Visions series, about which I had mixed (at best) thoughts, was
made by a company called, if I recall correctly, The Center for the Study of
Visual History, headed by one Lawrence Pitkethly. They were in New York.  I
would hope that the out-takes have been preserved.
Best, Jay Anania