I am looking for the Lego Duplo Mosaic Tiles that are contained in either set numbers 9534, 9531, or 779531. These games were available starting in 2000, but have been discontinued. We used them in teaching children with perceptual and cognitive challenges. We have a set but, with the different levels of cognitive challenged individuals, we need duplicates to allow for creating "sets," of cards and mosaic tiles by age and level.
I have only found complete sets in Europe, which are prohibitively expensive to both acquire and ship and, since we are not using these as games, but as training materials, we cannot afford what they are asking.
Let me know if you have some or all of one of these games/pieces/tiles, please.