@1234 -- Was Melvyn Rutter able to help you with the fold-down windshield?
Here in the USA we have quite a few 1951-57 Morgans with original-type fold-down windscreens, but replacement parts are almost non-existent. A friend with a 1956 four-seater was able to fabricate a new section of the post from stainless steel billet.
FYI: In comparing the folding base-and-post assemblies (stantions?)we noticed that the castings on my 1953 +4 were noticeably thicker and sturdier than those on his 1957 +4.