RISO has 5 models of digital duplicator for you to choose from:
SF5130 - single drum, 130 PPM
SF5450 - single drum, 150 PPM
SF9450 - single drum, 150 PPM, built-in editing capability
SF9490 - single drum, 190 PPM, High Definition Ink, Masters
MH9450 - dual drum, 150 PPM, registry of 1/128"