You got me! OK, I have Trial By Jury and a few songs from some of the others.
About 15 years ago, PBS ran ALL of them, excluding the reproduction of THESPIS,which my parents' troop was responsible for resurrecting and reconstructing, including COX and BOX ( which is Sullivan without Gilbert )via the BBC.They aren't : great ", but better than nothing. The PBS stores used to carry them and some libraries stock them.