This is almost too out of reach to list but if for some reason you need an extreme high end shoehorn, here you go. “The Exquisite Shoe Horn is carved from real, naturally shed, Scottish Ox horn, by a company founded in 1749. To provide ample thumb traction, mirror finished, solid 925 sterling silver coins bearing the Bunney and Mr. Hare marks have been inlaid at the handle by another company known to supply the royal households.” Actually the price tag is around 400£ – still a stiff price for a slip in device. DSM, Oki-ni, and Colette will have them.
More looks after the click.