I can't help you with getting any of these as Notion files, but I can point you to a website that lets you download full score sheet music in PDF format. You'll be able to find tons of scores to study on this website from past composers -- particularly Bach and Mozart since their music has passed into the public domain. You won't find any stuff to download from more recent composers though (Stravinsky for example, or any film composer) because their works are still under copyright.
The website is: The International Music Score Library Project --
http://www.imslp.org/Something I do frequently is pick a specific passage I wish to study -- input that passage into Notion and mute/solo certain instruments or sections to here how the composer has structured the piece.
Hope that helps!