Tricky. I'm not much of a soundtrack collector, so can't help you there. I like "Nomadic Impressions" by Open Canvas. Here's a
link , it's got some samples. It's kind of an ethno-ambient middle-eastern CD ... none of the music is particularly beat-y or happy. "Indumani" (also by Open Canvas) is not as dark as "Nomadic Impressions". But neither is probably as spooky as what you want. I'll keep looking.