I could be very wrong, but in all my hunting, I have yet to see one made of soft top material. I've seen either vinyl mbtex (with snaps) or thin red or green fabric (in a roll with string ties), not of the thickness of a softop.
This would be an awesome post for our friends at the pagodentreffen.de site. Rolf-Dieter or Alfred, do you have passwords there? I just registered, aber meine deutsch ist nur einfaches. If not, i can try to cobble up a translated question, to gain some clarity on this whole tool kit issue. I see vagueness on this site going back 12+ years. There may even be members on that site who used to work on the line, or their dads or uncles did.
Nicht so schlecht, eh?
Mike Mizesko