Got an idea here. I think that you could use any of the solderless, crimp-on bullet connectors in these rubber boots. The secret is the crimping tool in that it doesn't deform the terminal like regular crimpers do. Being crimped with the AF8 tool allows them to slip into the nylon inner sleeves. The problem is that the sleeves, the notched washers, boots and terminals all come together in a kit. And you're right, the guys that have them are pretty proud of them. If anyone has a package of the terminals, there should be a 5 digit "mfr. code" on there. That number can be researched to find out who makes them.