Is there a bottom snap on case for the Sony Vaio S series 15inch?

I know there is a top snap on lid from sony, but this is only for the top. http://store.sony.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&productId=8198552921666469678&tab=featuresTab#features Is there any place online where I can buy the bottom case??? Thanks for the help