Technical Cabriolet fabric by the yard?

Do you know app. how much fabric I need to sew a cabriolet top for a '34 Ford Roadster with Duvall Wind screen?

And where can I buy it?

 

Buy it at Bill Hirsch auto,
www.hirschauto.com

 

What kind of material. Some types have a napp and needs to be cut in a certain direction, or the material will look like two different colors. Make paper patterns ,then lay them out on the floor , like a makeshift grid. You first need to find out how wide the topping comes in. Example: 50 inches wide.