I have enjoyed Tekumel for a very long time (since 1980 in fact) and now that I have more time to devote to it . I have always though why the land area was never expanded but then I read an article on Tekumel by MA Barker about gaming in Tekumel . The article stated that the northern area was the start and the rest of Tekumel was up to the players, so I began to expand the world .
I use 28mm miniatures for the game , I have gotten Eureka's Aztecs to use for the player characters because they fit the general idea of what a Tekumelian would look like to me . I plan on using Mayan and Philippine myths / legends in the this .

That sounds like a cool idea and I can totally see it work.

I know that a while ago, actually several years, then I had an idea for a realm south of Tékumel "proper" or whatever it should be called, based on the early Caliphate which like the Second Imperium had broken into various successor realms competing with each other by the present timeline.