I have a 70' 521 with a Wilwood disc brake kit on the front brakes. Talking to Wilwood it's a kit they don't make anymore.Is there anyone who makes a kit that I can use to replace the outdated one I currently have? I was able to get the pads and the caliper is still made but they don't make the rotors anymore. Anyone have any ideas of the least expensive way to fix the brake problem? Thanks.