If it is internal ones you want, have a word with Scotjimland. From memory he got the necessary materials and made his own.
Hope this helps.
Try Tayormade 01484 661918, He made my EXTERNAL ones for a Pace Arrow. But i am sure He asked at the time if I wanted INTERNAL. Any how got to be worth a Phone call. My current rig has Thick LINED curtains and I find I don`t reay need them.