Following on From Andy purchasing the spare I had (and then there being some discussion about remaking/authenticity etc) there's 2 auctions on Tradera at the moment - looks like the outer skin and the bottom are separate pieces (and in 2 auctions)
I think they're for the opposite side to Andy's too!
The Tradera auction is for an inner and outer. One piece repairs the bottom edge of the door body which abuts to the door skin. The second part is the outer door skin bottom panel repair. These used to be made by Veng during 70/80's as after-market spares possibly a cheaper alternative to those supplied through Saab. Could do with a few kits of these to repair some old doors.