The Ultra ULT40443 2.5" hard drive enclosure installs (2) 2.5" drives in the space of a 3.5" drive. The fit is almost perfect. You can use the existing connectors since the power is split within the enclosure. This makes for a very clean install. If money isn't a concern look up the Icy Dock 2s enclosure. It includes Raid functionality and should be an exact fit. The Icy Dock allows the removal of the drives without removing the enclosure which is nice. I'm running a 120GB SSD and a 120GB HDD in my enclosure. No heat issues whatsoever with the drives.