Based on this product's specifications, here are some alternatives and similar models
Folder binding accessory Leitz 24220090
Summary description:
The Leitz 24220090 folder binding accessory is designed for efficient document binding. Made from durable polystyrol, it features a compact size of 2 mm width, 335 mm depth, and 155 mm height. Its grey color adds a professional touch, making it suitable for office use. Ideal for organizing and presenting documents neatly.