There was a Video Tape of Doc made by the Smithsonian Institute - I was there at the time, however I never did get a copy, despite looking everywhere.'Frailing Banjo' by ERIC MULLER & BARBARA KOEHLER Pub MelBay - No ISDN number - But if you ask at Elderly Instruments they will get you a copy.
Clawhammer By Larry Peterson This one is not in print as far as I know - but if you look around ther are lots of others. Incidentaly Muller&Koehler shows you how to play Clawhammer and has a bunch of gureat tunes including Shady Grove, Little Sadie.
Doc UP PICKS little Sadie !!!!!!!!!
The best setting of the Cuckoo is in a Book by J Burke - published by Amasco Publishing. ISBN 0-8258-2801-6
I don't know of any tabs off of Doc's playing and I should think them a little tooo hard anyhow. Hope that helps :)