Based on this product's specifications, here are some alternatives and similar models
Studio Film Clapperboard Openmoon SB9511, small 15×15 cm white, for markers
Summary description:
Openmoon SB9511 is a small studio film clapperboard measuring 15×15 cm in white finish, designed for use with markers. It’s a compact production tool for scene and take identification during filming, suitable for indie shoots, student projects, studio recordings and small-scale productions. Lightweight and easy to mark, erase and transport.