Most of those recordings were originally included on RPM Records' 2004 CD compilation The Dream of Michelangelo, which also included eight tracks by the group's original freakbeat incarnation, The Kirkbys (best known for the strutting single "It's a Crime"). Think Like a Key's new comp Michael Angelo: The Complete 1967 Recordings loses the Kirkby's material, but it gains a couple of demos Campbell recorded shortly after The 23rd Turnoff turned off: one is a 1968 remake of "Another Vincent Van Gogh" and the other is the Kirkbys-like rocker "Lovely Elisa Cope Is Dead", which either boasts one of the all-time-best or all-time-worst titles, I haven't decided which yet.
Better yet, Michael Angelo: The Complete 1967 Recordings is a vinyl release and a vinyl release on very quite plastic with a perfectly centered spindle hole. Because this stuff all comes from acetates and ancient singles, the audio quality varies from "that does not sound half bad!" to "is there even a song under all that snap and crackle?" But that shouldn't deter fans of this kind of heady stuff, who know some things are much more valuable than audio perfection.