Check SparkFun, DigiKey, Mouser for the connectors.
NO, you can not plug a DC motor directly onto the Axon output pins. A servo contains circuits to receive the low current pulse train (pulse width is translated into a servo position) from the processor and a high current motor drive circuit.
To run a DC motor you need a drive circuit. and much different signaling than a servo.
There is information on both servos and DC motor drivers in the SoR tutorials and articles.