We don’t currently have any extensions available to purchase, I’m afraid. However, this doesn’t mean to say that we won’t produce harder decks that cover harder graphemes, in the future.
OUGH and TION are not individual graphemes, but rather spelling patterns. OUGH in particular, as it appears in some very commonly used words like 'enough', is covered in our sight words sticker books. If you’d like to take a look at our sticker books, please head to the following link: https://www.mrswordsmith.com/products/see-it-stick-it?variant=17877837905971