Arduino driver assistance

HI, guys.

Is there a 3 amp or higher current stepper driver board for the Arduino that I can just wire or plug in? If you know of such please give me the source and part number. I'm using Arduino 2560 mega from SainSmart.

Thank you so much.

Can you spell Google?

3A or higher? is that really have? all i found that the peak current of driven part is 2A.