My pleasure, James. Your and your friend will be interested in the following, if you are not aware of it already. This is from the Village Records site - www.villagerecords.com The album is not yet mentioned on the Sugar Hill site but, evidently, it is to be released on 25 July:

Doc Watson Foundations: Guitar Instrumental Collection

Someone's been looking over my shoulder. I've compiled tapes like this years ago. For my own personal use of course. This collection is a great sampling of Doc's instrumental works from over the years. And I mean over the years, it spans 34 years and a century of tunes and styles. There has never been anyone like him, and there never will be. This is a collection for the ages. Inspiring. Sugar Hill - 25 July.

Cheers, Stewie.