Pseudo-Tibetan items abound in the market. As you mention, many are made in Nepal. Many beads, such as jade and also new fake dzi, are made in mainland China and sold with reference to "Tibetan" because it sounds more exotic than "Brand New Chinese (or Made in Nepal) to emulate Tibetan style". Similarly, pseudo-Naga artifacts are very available - repro items also made in Nepal in a style to emulate tribal Naga. Be careful, and learn about what interests you. Go into a purchase at the average show knowing that you are probably buying new repro if the price is affordable. Buy it if you like it.

Here is a link to the L.A. Asian and Tribal show this weekend. It is a vetted show - with no new repro items. This promoter has the highest standards and provides a showcase for tribal art like no other.