Based on this product's specifications, here are some alternatives and similar models
AWTools sanding block 100×70×25 mm P100 abrasive AW55704
Summary description:
Hand sanding block from AWTools sized 100×70×25 mm with P100 abrasive grit. Designed for manual sanding and finishing of wood, painted surfaces and filler, the block provides a stable flat backing for abrasive sheets and consistent pressure during sanding. Suitable for surface preparation, smoothing edges and light material removal in carpentry and DIY projects.