Does anyone know where to buy a lighting coil for a 71 TNT 440 or a 73 TNT 440. I can find nos internal and external ignition coils as well as aftermarket. However it seems that a lighting coil is next to impossible to find. I am wondering if anyone knows where to locate one or where/ how much it would cost to have one rewound. Also has anyone attempted to retro fit a newer ignition to and older sled. Any help would be much appreciated. Thank you.