I have the MuseScore files I created for this, and that can export to XML, but I've never done that before, so I'm not sure how the fidelity is. They are also optimized for audio over visual, so I did some things that are maybe not pretty in the interests of making it sound better. (e.g. spelling out ornaments explicitly rather than just using the symbols, doubling up on the string parts for a fuller sound, etc.) If you just want the sheet music, the original PDF's are free on IMSLP, which is where I found them. Link is in the description. There's one file for the piano (which was also used for the visuals in this video) and another for the orchestra parts.
