Music scores that match lessons in Tonebase?

Is there any way to get the exact (if possible) music scores that are used by the instructors?  So far the two that I have delved into have unfortunately been wrong (either wrong score altogether or erroneous fingerings that don't match the lesson). In particular, I was looking at BWV998 Prelude (taught by Judaciel Perroy) and Choro de Saudade (taught by Sabrina Vlaskalic).  Since they are the first two that that I have looked at and that they are wrong, I am thinking that the others might be wrong as well.  I realize that the notes during the lesson are provided on the split screen, however, they do not play the entire piece so the rest of the score is missing.  The downloadable scores, as I mentioned, are either the wrong score altogether or have clearly erroneous fingering that is contrary to even the notes shown on the split screen.  I appreciate any help.