http://www.talkmorgan.com/ubbthreads.php/topics/608551/1This thread deals with a 8" inch wiper from Car Builder Solutions,
https://www.carbuilder.com/uk/stainless-steel-sprung-windscreen-wiper-blade-8, so just one inch in excess. Easy to cut some mm of the outer end, so no conflict with the upper metal edge of the windscreen. They do touch the lower edge though, but so does the original wipers seemingly with no harm as just rubber touches the metal. You could perhaps cut a couple of mm here too, but not so much that it will make a difference. I ordered one to try it out, cut it and put it on yesterday. Seems to work ok (at least in the garage...) so I will order two more. They have a tight fit to the wiper arm, so I do not see how they can come loose.