There's about 5 editions of the 'music from porn soundtracks' series now.
Also, there's still that wonderful Elephant orchestra record (
http://www.mulatta.org/Thaielephantorch.html ) which is actual elephants playing actual instruments.
The Shaggs come none higher recommended.
And you know what? I think you should get Arvo Part's Miserere. I don't mention him enough. He's fucking unbelievable. Listen to him.