Based on this product's specifications, here are some alternatives and similar models
Wash Bucket Grit Guard Insert Meguiar’s X3003 27.2×27.2×2.5 cm Yellow
Summary description:
Meguiar’s X3003 Grit Guard is a plastic insert for car-wash buckets measuring 27.2×27.2×2.5 cm designed to trap and separate dirt and grit from wash water. Placed at the bottom of a wash bucket, it helps prevent abrasive particles from transferring back onto paint during washing, improving paint safety and reducing swirl risk.