A colleague of mine is looking for a VHS(NTSC or PAL) or DVD(Region 1
or 2) copy of director Michael Powell's 1964 film of composer Béla
Bartók's opera, "Bluebeard's Castle/Herzog Blaubarts Burg."
<http://www.imdb.com/title/tt0077672/>
This was a West German-funded production that Powell filmed after
basically being banned from directing in Britain following the release
of the controversial "Peeping Tom" (1960).