Fabric help needed for tractor enclosure

Well Im thinking this is the last year for the material on my JD cab enclosure. Its got so many wind/snow leaks its time to rebuild for next year. Was wondering if anyone knows of a supplier for the clear plastic windows and the actual cab material(soft top). I can get it sewn together just need to find a place to buy material. Its got a really nice fiberglass roof but the sides and rear need revamped. I will turn some of it into metal. Of course first I must finish this Dart before taking on another project!
Thanks for any help you can send my way
Rod