Hi Don,

I bought my seat covers online from Seatcovers Unlimited. They have custom fit seatcovers for just about every car made in the last 30 years. Big selection of materials, too. They were a real wrestling match to install because they fit so snug, but they look like they were made on the seats. Here's the link:
http://www.seatcoversunlimited.com/

I got the pleated material and plain material online from Gary's Upholstery Products LLC. They have all kinds of stuff. I went to the marine upholstery section and got exactly what I was looking for. Here's the link to them:
http://www.garysupholstery.com/

For anyone who wants to know, I used a Dynamat type insulating material on the firewall, floor, and ceiling. I made my door, kick, and side panels out of 1/4" weather resistant luan plywood. I simply cut it to shape, pre-drilled all the holes, applied the vinyl with 3M spray adhesive, folded the edges over & stapled to the back, and screwed the panels in place with stainless steel self-drilling screws and chrome escutcheon washers. The headliner is masonite hardboard done the same way, but without the staples. The curved rear cab trim panels are made of 1/8" lexan that I heated with an electric heat gun and curved to fit. After jig-sawing the holes for the speakers, I applied the plain vinyl with 3M spray adhesive. The trim pieces above the doors, the door window sills, and the header above the windshield were made from a variety of aluminum flat stock and angle. After shaping the pieces to fit, I covered them with the plain vinyl applied with 3M adhesive. The carpet is indoor-outdoor Berber from the local flooring store, cut to fit. The sill plates are made from ordinary aluminum floor edge trim from ACE Hardware...