From BratProductions.com:
TRACKS:
Roy Orbison – “Oh, Pretty Woman” (re-edited album version)
Eddie Van Halen – “Oh, Pretty Woman” (only the guitar track via unnamed source)
DESCRIPTION:
What would it have been like it Eddie Van Halen and Roy Orbison had a proper duet on “Oh, Pretty Woman”? Well, I try to answer that question with this. This is the original 1964 Roy Orbison recording, with just Eddie’s guitar track from the Van Halen cover version. A bit of pitch and time correction, and a lot of little edits, gets you this. Play loud!