Hi rolbckst,
Vaio graphics drivers are rarely updated unless they cause major problems so don’t hold your breath on this.
You can, at your own risk, install the latest driver from NVIDIA but you will need a modified .inf file or the install will fail. Have a look at the following link for both the driver and modified .inf. Be sure to read the Quick Start Guide towards the bottom of the page.
http://www.laptopvideo2go.com/drivers
Rich