I've got the german dvd's of
Orgasmo Nero and
Sesso Nero, they can be picked up (along with
Porno Holocaust)
here (
Porno Holocaust &
Sesso Nero are in italian only)
Erotic Nights can be found
here
I had the Exploitation Digital dvd of
Porno Holocaust but foolishly got rid of it. The US disc listed on
amazon is a bootleg.
I could be wrong but I don't think
Hard Sensation or
Porno Esotic Love are available on dvd.