Below, NPD, is where i found the plastic/rubber 2 piece wire-on like the original vs that fold over stuff for mine several years ago. It had just come out. If link doesn't work go to www.npdlink.com then in the search bar type " convertible wire-on "
If you have that rolled cloth type one i'd spring for the plastic/rubber type as the cloth ones seem to fall apart a lot sooner. If you check the length they are the same as the Mustang or my '64s was at least.