I replaced my wiper arms last year from “Vintage Supplies” based in Malvern; I suspect they are the same make as those from Holden referred to above. I did some research trying to find arms that would fit but also produced a larger spring force on the blades to wipe the screen better. The originals on my Slough car were pretty hopeless. I am pleased with these new arms, they work much more effectively and look well made. They were roughly the same price as the Club Spares.
John Moon