OWC has a new 480GB SSD drive that serves as an internal hard drive upgrade for the MacBook Pro Retina. The Aura Pro is available as a single replacement drive or with the Envoy Pro kit that features an enclosure with USB 3.0 connectivity for putting the original drive that you’re replacing and using it as an external drive.
Check out the overview video from CES 2013 below.
The Aura Pro currently retails for $579.99 and the Envoy Pro kit retails for $629.99. OWC ships everything you need to make the drive switch, including tools. More details on OWC’s website.