Based on this product's specifications, here are some alternatives and similar models
Electrical distribution board accessory Legrand 20035 — width 23 mm, depth 341 mm, height 13 mm
Summary description:
Legrand 20035 is an accessory for electrical distribution boards with dimensions 23 mm (width) × 341 mm (depth) × 13 mm (height). Supplied as 1 piece per pack, it is designed for integration into distribution enclosures to support mounting, spacing or finishing tasks. Suitable for electrical installers and panel assembly in residential and commercial installations.