Patty,
I've bought machines with too short foot controller cords. There are several ways to fix that.
One:
If the cords are in good condition you can splice in an extension piece. I've done it, it's safe and works good. Solder the splices together and use heat shrink to insulate them. Then I put connectors on the ends so I have a good strong connection inside the controller.
Two:
If the cords are questionable, replace the cord block, or rewire it.
Either way you won't need to replace the foot controller unless it's got a problem too.
Joe