Based on this product's specifications, here are some alternatives and similar models
Angle DMX KW6 DMX 125×125×20×4 mm narrow corner metal angle
Summary description:
DMX KW6 DMX narrow corner angle, dimensions 125×125×20×4 mm. Metal corner profile designed for structural support, edge protection and precise joining in construction or finishing works. Suitable for use in framing, cladding, shelving or repair tasks where a slim, sturdy corner reinforcement is required. Simple to fix with screws or welds depending on material.