Ordered 10 from Digikey. $12 each
2 channel motor driver
servo connectors
i2c or gpio connectors
Grove pinout. Uses HY2.0-4P connectors. Kit comes with some cables.
HY2.0-4P
https://www.cytron.io/p-maker-pi-rp2040-simplifying-robotics-with-raspberry-pi-rp2040
https://github.com/CytronTechnologies/MAKER-PI-RP2040
datasheet
schematic
CircuitPython distro