Motor rpm is about 6000rpm. Don't know the specs of the motor.
Flow is 350ml/minute
150 to 210psi
Gears is one thing, but .0001" tolerance within the pump housing is primary in achieving success with these minature pumps.
Hard to say what demand might be, but I would guess once word got out that they were "locally" available for around $250 - 300, 50 pumps a yr, maybe more.
There's a great deal more enthusiasts out there in north america that do not participate on forums... lots of lurkers on forums though.