You can get wire at home depot , lowes, ace hardware, wire really isnt the issue, why do you need longer wire, if its a foot control and you just upgrading your previous wire should be all you need, that and what came with motor. If by some weird circumstance you do need longer power cable, your better off to remove the orig cable and replace the orig cables with longer cables, and dont just add on some make sure you buy cable that is at least as big as what came with motor, but bigger is ok too