Oh, I might have the Bayless Rose version too. What a guitarist! Jamestown Exhibition is one of my all time favorites. Now there's one I know where to find. It's on an old Old Timey LP, but also on Volume 1 of the Yazoo Before The Blues Series.

I just made a search: While I don't have them, I know both the Rose and Justice versions of Black Dog are on the Document reissue series. Another possible source would be on the Yazoo anthologies.