For my 1966 Mustang, I called ARO, EZ-ON, Kee, and Robbins. A lot depends who you talk to on the phone, but I decided on ARO. They said they were the original manufacturer for Ford at the time. They were able to put on the brass zipper, and the leather snap for the attachment to the top frame. I made the leather attachment to the zipper end from baseball glove leather. I am happy with the top.