Anton Urspruch's comic opera Das Unmoglichste von Allem (1897), which was broadcast on German Radio last year, has popped up here:
http://premiereopera.net/das-unmoglichste-von-allem-by-urspruch-leverkusen-2011%e2%80%a1/ (http://premiereopera.net/das-unmoglichste-von-allem-by-urspruch-leverkusen-2011%e2%80%a1/)
I don't know if the original performance was complete, but the broadcast is descibed as excerpts with commentary. Still, substantial chunks, if it fills 2 discs...
(Hope this doesn't violate any guidelines.)
David