Central Asia maps

To Prof. Gunder Frank or anyone else who might know - 

I am looking to acquire some large maps of Central Asia (Central Asia
specifically, and not as part of China, the former USSR etc.), and I am
wondering what sorts of institutions (US gov't agency, UN, etc. would have
such maps commercially available.

Thanks in advance for your help, 

-- 
Boris Stremlin
bc70219@binghamton.edu