This is the link where have I ordered it : http://www.ebay.com/itm/L298N-Stepper-Motor-Driver-Controller-Board-Arduino-/200659789109?pt=LH_DefaultDomain_0&hash=item2eb8416535
And this is a link: http://www.bristolwatch.com/L298N/L298N_arduino.htm
From a guy who has connected it to a stepper motor, maybe it can help?