I used to purchase https://www.phidgets.com/?prodid=320
NEMA-17 Bipolar 48mm Stepper, ID: 3303_0
"This affordable bipolar stepper has a 1.8° step angle and 4.24 kg·cm of torque at low speeds"
(to go with 1067_0 stepper controller).
What is the alternative to that motor @Phidgets, having (at least) the same torque (for ~12-18V, 5A max)?