Toshiba have just released a new 2.5" 750gb Hdd thats only 9.5mm in depth, and will fit into the MS caddy. Anyone looking for a large internal drive I hope this helps.
http://www.ebuyer.com/product/233904utm_source=google&utm_medium=products
http://www.ebuyer.com/product/233904utm_source=google&utm_medium=products