It's always good to get genuine parts, but in the meantime I found some old army felt and got a dressmaker to neatly cut me out a few washers. Found sets of domed centre hubcaps online made of plastic which I can paint white and glue in place. I made up a dust cover out of a piece of thick rubber hose and some washers. Looks similar to the steel ones. Pope parts are hard to come by so this might be as good as it gets.
