Hi Rune
The original "S" weatherstrip is extremely rare.
Luckily we were given the rubber seal by a good friend "P" who got extruder dies made using a section of the original strip and he manufactured a batch of the rubber for a few original restorations in the US.
I located a local supply of correct steel gripper and the black fabric for him so one of the next jobs is to stitch it all together.
I also purchased a Singer 29K cobbler's sewing machine just to do the job as I discovered it's tough going doing it by hand.