There are no transcriptions that I know of. It was a deceptively simple style-- don't be fooled by people who say that he did a precursor of bluegrass 3-finger rols.
The most common pattern is : thumb on 4th string index on 2nd and middle on 1st-- try:

count 12341234

      TIMIT I

good luck-- email me privately at lutrine@earthlink.net for my own ideas on how it's done. Kinney R (who you'll hear on Ron O's program) plays more notes than i do but I think we both have the same idea.