I use old lamp cords to replace sewing machine cords. Don't know if that is kosher or not, but they work for me. The 15's, 99's, 201's and most belt drive machines I will rewire myself as they are soooooo easy to do. All the electrical is external and comes off with a couple of screws. Now other machines like the 221 that have internal electrical, well, those are a different story but still doable. But I say go for it and just test it as you go with a good extension cord with a switch and circuit breaker built in. Just keep track of which side of the cord is attached to what.