3x7 (Merle Travis) is on Roy's 1977 album 'Ragtime Millionaire' on Blue Goose 2023 (when he still was Roy Bookbinder and not Book Binder). To my knowlege this album has never been released as CD, nor has he recorded that song elsewhere (see my RBB discography at http://www.wirz.de/music/bookbdsc.htm

Stefan