Based on this product's specifications, here are some alternatives and similar models
HAN-Bürogeräte HAN IMPULS Polystyrene Storage Box C4 White, polystyrene (PS)
Summary description:
HAN IMPULS storage box made of polystyrene (PS) in white, designed in C4 format. Rigid polystyrene construction provides lightweight, durable storage for documents and items. Interior dimensions 240 x 325 x 37 mm suit C4 contents; overall dimensions 280 x 367 x 235 mm. Single-piece pack from Germany, suitable for office and home organisation.