Um...for tribal drum music, there's Tribal Drums, Tribal Dances and Itneen by Fat Chance Belly Dance and Helm. I think Gypsy Caravan has five or six CDs out now? They've got a lot of drum pieces in them. My favorite track from them is called Procession. I'd select the tracks that you like and make a mixed CD out of them. They're all available for download on iTunes and Amazon, so you can pick out the tracks you like and leave the rest. It's cheaper that way, especially since they have a lot with that horn instrument (I can't believe I can't remember the name!) that they use in the Middle East, that high pitched whine. I couldn't stand that in labor, personally.
What about looking for African drum rhythm CDs? I know there's a lot of variety out there. A lot of the rhythms used at drum circles are actually African in origin, so it might be good to take a some time and listen through a few samples. If I come up with anything specific, I'll let you know.
This is exactly the kind of music I'm looking for myself, so if I find anything good beyond my own collection, I'll definitely let you know!