In my above posting, I meant to say 'Cajun' not 'western swing' - Stratchwitz great western swing compilations still lie in limbo.
Many of my favourites have been covered, including the fine Robin and Linda Williams, but to add a few not mentioned: The Johnstons, Robin and Barry Dransfield, The Seldom Scene (particularly when John Starling was present), The Young Tradition, Jolly Jack, Red Clay Ramblers, Muckram Wakes, Regal Slip, Swan Arcade. One of my all-time favourites is the album by Ricky Skaggs and Tony Rice 'Skaggs and Rice'. Sugar Hill reissued it on CD with a lamentably short running time - perhaps that is all there ever was available, but every moment is a joy. Of course, great harmony groups abound in the black American tradition, particularly in gospel, but that is another story.
Susan, the second Trio album is indeed available. In addition, there is another new release: Linda Ronstadt and Emmylou Harris 'Western Wall' (WB). This features them as duet partners and includes Olney's '1917' and Cohen's 'Sisters of Mercy'.