As far as I remember there was a collection of remastered CDs with some bonus tracks in the stores a few years ago, "Thriller", "Bad" and some others. On the "Thriller" remaster there were a demo version of Billie Jean which made my hairs stood in my neck, so awesome to hear this musical feel MJ has. An there was also an acapella of the whole "Rap" of Vincent with all 3 verses.
See if you can get them somewhere, it is definately worth it. Also because of the interview with QJ on it.
Greetz,
Mike
