I find there are lots of in Taobao and Taobao agent as follow, and the price are quite reliable and competitive
http://item.taobao.com/item.htm?spm=a230r.1.10.175&id=15613261845
http://www.buychina.com/products?keyword=%E8%97%8D%E6%99%A8%E5%AE%89%E5%8D%934.0&cid=
most of this are only US$ 80...