For Haydn’s Creation Mass in B-flat major (Die Schöpfungmesse, Hob.XXII:13) scores are available here and here and there’s midi files here. YouTube has a range of recordings, including one with the Concentus Musicus Wien and the Arnold Schönberg Choir under Nikolaus Harnoncourt here.
Trouble playing ‘midi’ files? You may need to specifically allow your browse to play the files; a window sometimes pops up on the page asking permission or you may have to change your browser’s security settings. Cyberbass have a useful troubleshooting guide here
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