[JamesKennedy]

Well, what I can think of right now are Globalsecurity, Sinodefence and Janes, but I would assume that you know all of them, other than those, you will have to look into Chinese sources, like http://military.china.com/zh_cn/, or sites for magazines like http://news.sina.com.cn/jczs/ http://jczs.news.sina.com.cn/nz/bqzs/index.shtml http://jczs.news.sina.com.cn/tank/index.html http://jczs.news.sina.com.cn/nz/xdjs/index.shtml
I can do the translations if you like.