Based on this product's specifications, here are some alternatives and similar models
Sanding Block 98×68×25 mm Grade 60, pack 1 piece, No name (MPN 49193)
Summary description:
Sanding block sized 98×68×25 mm with abrasive grit P60 supplied as a single piece. Designed for manual sanding of wood, metal, paint and filler surfaces; useful for shaping, leveling and preparing surfaces before finishing. Compact rectangular shape provides stable grip and even pressure distribution for consistent material removal during restoration and DIY tasks.