Musée du Quai Branly's website is
An important new French Museum. The website is (mostly) in English, though the search engine is mostly in French. When you get to the site, you should go to right side of the screen: Spotlight on the Collections, don't bother filling in the blank line, just click the orange arrow. That will take you to a page where you can select a catalog. Just leave the catalog of objects checked (uncheck the other two), and type in the search term. I typed in Tibet, and got over 1,100 objects. If you want to look for your specific object and don't know the French or Tibetan term for it, you can use the google translation tool or Babblefish to translate from English into French (Tibetan does not work yet). Thousands of pictures of objects are available in the "Scientific documentation" section.