New PM (Mandolin PianOrchestra) rolls can be bought from
Thomas Jansen; see http://www.musicrolls.de/Rollen%20pdf/PM.pdf 

Wurlitzer initially imported Philipps PM orchestrions and after
setting up manufacture for themselves used the same roll scale.
Later Wurlitzer orchestrions used a modified scale called the
Concert PianOrchestra [PC].  As long as your machine plays 
Wurlitzer Mandolin PianOrchestra rolls you will get great music
from Philipps PM rolls.  Philipps original arrangements are far
superior to anything Wurlitzer ever managed to produce.

Sincerely,
Nicholas Simons, GB