Based on this product's specifications, here are some alternatives and similar models
Wooden Carpenter's Square MEGA 500 mm model 21055
Summary description:
Wooden carpenter's square MEGA 500 mm (model 21055) designed for measuring and marking right angles in woodworking and construction tasks. The 500 mm length provides accurate layout for boards and panels, useful for cutting, assembly and verification of squareness. Durable wooden construction with clear scale markings for practical on-site and workshop use.