This product is either discontinued or we cannot get that from suppliers.
3m 70005292233 Post-it Dry Erase Surface 1800mm X 1200mm, Dry Erase Surface, Stain-proof material, Smooth surface is easy to write on.
Post-it® Dry Erase Surface is designed to stick to a variety of painted drywall and steel surfaces, glass, finished wood, and existing whiteboards or chalkboards.