You will need some kind of 12 (or less) volt power supply. I have used wall warts from thrift stores or you can get a variable voltage power supply from someplace like walmart. I have also salvaged power supplies from computers or external CD or hard disk drives.
Once you get the power supply, you will want to cut off the end of the cord, separate the cord into its two wires and probably attach some spade connectors that will fit onto the motor power connection.
I'm not sure what type of load your putting on this, but the ucrrent draw of theis motor at 12 VDC with no load is 10mA (milliamps). I'm guessing you plan on using this for a FCG. If the load reamins fairly light, such as a FCG, a 12 VDC 1000 mA walwart should work just fine.