[macphersonrants]

I just recalled running across Tibetan sorcery in a few pulpish novels. You might have spirit conjuring and you certainly get the ability to create Tualpa (independent thought forms- work like spirits), which I seem to recall getting a GURPS treatment somewhere.

Katherine Kurtz used Tibetan sorcerers as villains in Dagger Magic. Tibetan demons turn up in in Child and Preston's The Wheel of Darkness.

I seem to remember Eric Lustabader doing something with Japanese mystics, but I don't recall the basis.