I love
Black Lotus Clothing
Her website is a little lacking pics-wise as she had SO MUCH cool stuff at Tribal-fest; if you email her and tell her what you are looking for you prolly will have some good luck.
Firefly (
Flash Page ) has some nifty kinds of pants.
Kathleen Crowley has awesome ruffle pants and has an etsy shop:
Etsy :: KathleenCrowley :: KathleenCrowleyCostumeCouture
Theres a buch more that I'm blanking on right now. :p Do you have any specific pics of what you are looking for?
As for ebay searching I usually just search "tribal belly*"