Asian Tribal Art

I've always been interested in tribal art, whether in the form of masks and statues, and is either Asian, South American or African origin. It was easier to find things African while living in Europe and know only rarely that I come into a store that sells this stuff. Whenever I come across one that I'm still fascinated. However, even though I know I can buy online, which removes most of the fun, and I want to find shops nearby. Everything I search on Google Maps or Google to find a store has failed. Any idea on how to find these stores, or anyone know of any in the Chicago or Detroit areas?

I've always found the best examples in my collection in the second hand stores, markets, garage sales (Zoos in the UK), etc.. If you buy elsewhere, they have always been made for a Western market.