I have a 41 seat that I got an aftermarket custom seat cover in black grained naugahyde. I had to do repairs to the bottom seat assembly and now it is at the upholstery shop for padding, installation, foam support where neededand I am pretty sure they will be using hog rings. The factory used push in clips of a sort which probably work better if you can figure how to get them in. If you use tyraps I would prefer the nylon ones of old that have a metal catch in the head.
