I came across this neat product by Kingwin, an internal SATA hot-swap bay. This allows you to insert either a desktop or laptop hard drive, and it connects direct to the internal SATA port.
You see this more commonly as a desktop dock where you can insert one or two SATA drives. Most of these connect with USB which is slower, but some are available with eSATA connections.
Here you see Stimpy top to bottom with: