The American automobile industry, more suppliers of accessories, made the (metal) sun visor popular. It only took a while and they were also available in Europe. For many an absolute must on a Volkswagen Beetle, Volkswagen Bus, MG Magnette ZA / ZB, Volvo PV444 / PV445, Amazon and so on. Go look for such a sun visor.
Not to do and if you find one, you'll pay a thousand euros for it. In Great Britain we have found someone who has some of those so-called sun visors has on offer. A raison of £ 145,00 per item, excluding shipping. You already get it, for such a price it is almost necessary, especially since they are made of metal! Further information: telephone 0044-7043-568.502