Found this in the UK. The shade was in a sorry state when it came into my care. I had to stitch the two panels back together and it took a few attempts to get the overlap distance correct.
You lucky thing @Paul Wallis, I have the lamp but never had any luck in finding a shade in the UK. Did you get any back story with it?
Yes, the preious owner's Grandparents bought it in the East End of London, most likely from the Coleman Quicklite Co in Chiswick, just after the war because the gas and electricity supplies were still intermitten.