Victor Bout seems to be the most likely candidate. He's known for moving ex-soviet military hardware in industrial quantities. Also, he seemed to be pretty well bullet proof as far as the American authorities are concerned. He was arrested in Thailand earlier this year.
http://www.timesonline.co.uk/tol/news/world/asia/article3498795.ece copy
http://counterterrorismblog.org/2008/03/viktor_bout_arrested.php copy
http://www.guardian.co.uk/world/2008/mar/07/thailand.russia copy