I use lamp, VCR, or other electronics cords from thrift stores for cheep. Otherwise you can go to a dollar store and buy the right colour of extension cords and cut them down. Basically open up the end- be it the plug or foot controller- take off the old wire and replace it exactly the same way with the new cord. No special tools required. I don't even use wire strippers, just scissors to take the plastic coating off. Its super easy and as a safety note, when testing new stuff, I always plug it into a power bar extension cord with the built in circuit breaker. In fact this is what I use with all my vintage machines anyways. My house doesn't have good electrical outlets, they aren't grounded. I learn't that lesson the hard way when I first plugged my 1939 featherweight with original end plug into the wall, it was fine until I tried to pull it out, that's when the sparks flew. Boy that was scary. I always replace the cords and especially plugs after that experience.