Why don't they sell any ENG merchandise? Or do they and I just haven't found it?
Out of curiosity, what merch. would you like to see in the park? It could be something that they once had and discontinued, something that to your knowledge has never been available but you wish they would produce, or items that are not for sale, but you wish they were. I think many guests wish they would produce and sell the books that were in the Buena Vista Street windows. (Myself included.)
Something I have never experienced for myself but wish I could are the little boxes of rock candy jewels I heard they used to sell around the castle. It would be awesome if they sold those again. Unless they do and I'm just unaware of it.
And my favorite thing to purchase from Disneyland currently are little packs of miniature Disney characters and rides. Even though I'm an adult, those things get me all giddy and I have anxiety they will stop selling them. lol