Based on this product's specifications, here are some alternatives and similar models
Stamp Rack Round Version MAUL 51006-90
Summary description:
The MAUL Stamp Rack - Round Version is designed to hold up to 6 stamps. Made from durable metal, it features a sleek black finish. With dimensions of 110 mm in width, 110 mm in depth, and 100 mm in height, it is compact and ideal for any workspace. This single-pack product is perfect for organizing your stamps efficiently.