A lot of collectors can cry all they want over photos like this, But the truth be told 99.8% of the people do not car about vacuums. This is what makes it a unique hobby but also a weird one in the minds of most people.
I wish their was still a vacuum cleaner shop in Cleveland Ohio like this. Still functioning and saving old parts. This store probably has a lot of NOS parts too. We used to have them but in the last 10 years around here a lot of the mom and pop stores are gone. (Not just for vacuum's) but for a lot of things you could get serviced. It is a throw away world now. How sad.
You will need to get in touch with the owner of that shop, first (because you live in the U.K.) by dialing the country code number representing the U.S. and then the phone number for the shop in question.