当当：
http://product.dangdang.com/product.aspx?product_id=20383551
卓越：
http://www.amazon.cn/mn/detailApp?qid=1222655847&ref=SR&sr=13-1&uid=168-8533525-6351419&prodid=bkbk860190
淘宝：
http://auction1.taobao.com/auction/item_detail-0db2-95948f0aeb1449d39b56c469c27adee0.jhtml