Monophobia and its predecessor, Lygophobia, were assimilated into the Paranoia Tapes series from Jack Hunter. They can both be found on Paranoia Tapes: DVD-
Made to improve upon the "loop" concept introduced in Lygophobia, specifically the inclusion of more people for more unique scenarios.
A final installment for the series has been considered. At the moment there are plans but, nothing concrete just yet.