https://www.amazon.co.uk/Electric-Gear-Torque-Reduction-Engine/dp/B08G78J7VZ/ref=mp_s_a_1_15?crid=3HU06BU767S2Z&keywords=12v+motor&qid=1638271776&sprefix=12v+mot%2Caps%2C104&sr=8-15
Im looking at a small motor like this one to drive a 2 rollers connected by a belt drive.
Lookingbat running a motor like this