I've got 3 of these little stepper motors with integrated reduction gearboxes.
12Vdc, 155 ohm, 4 wire
C35M048A03-X
7.5° motor step
1350:1 step down gear box.
I think some guys use them for driving telescope mounts.
As far as I know they are new old stock.
$20 + postage for the 3 steppers together. Prefer to post inside Australia only.