Thank you! I love that dress too. I don't have a pattern I just measured her and cut it out. I've been sewing for many years so I didn't really need one, although this is only the 2nd dress I've made her and the first pair of PJs.
I've been buying from YT members. There are so many YTers on here that made beautiful clothes,

I just didn't bother before to make them for her myself. But she is long and thin so it's difficult to get ready made things that fit her and she doesn't really fit the sizes for most of the clothing sites on YT.
But I know McCalls and Simplicity have patterns. I've seen them in the books.