Based on this product's specifications, here are some alternatives and similar models
Grinding Disc Backing Pad PRO for Angle Grinder, 22 mm Arbor Hole
Summary description:
Backing pad for grinding or sanding discs by PRO designed for use with angle grinders. Features a central arbor hole of 22 mm to fit compatible grinder spindles. Serves as the mounting interface between the grinder and abrasive discs, providing stable support for sanding, grinding and polishing tasks on metal, wood and other materials.