Based on this product's specifications, here are some alternatives and similar models
Whiteboard sheet NOBO 1915612 Acrylic transparent panel 210×297 mm (horizontal)
Summary description:
NOBO 1915612 is an acrylic whiteboard sheet designed for horizontal use. The transparent panel measures 210 × 297 mm with a 205 mm depth, offering a smooth writable and erasable surface suitable for marker use. Intended for information display, note-taking, small signage and office or classroom tasks where a compact, durable transparent writing surface is needed.