Based on this product's specifications, here are some alternatives and similar models
Rack rail Rittal 4398.000, steel, silver, pack of 4, for 19-inch cabinets
Summary description:
Rittal 4398.000 rack rail set comprising four steel rails in silver finish. Designed for 19‑inch server and network cabinets, these rails provide structural support and mounting points for rack equipment. Each pack contains 4 rails (package weight 8.88 kg). Suitable for cabinet reinforcement, device mounting and organized equipment installation.