HDD / SSD SATA III Adapter for MacBook (Pro) SuperDrive + USB box replaces Slim (money) for SuperDrive - 9.5 mm trolley kit (SATA - SATA) - TheNatural2020 (Personal Computers)
The idea is pretty good, but the quality of the set is blah. The plastic is "cheap" and the usb cable to the cd player. Fortunately, the driver provided is not too bad, and installation is really simple.