For pricing information for the carrier board you have to contact them directly, I see an email address here: http://www.auvidea.eu/index.php/company/contact. I know RidgeRun is getting one in a couple of days to work with the IMX219, the board already has the hw to do the i2c translation.
For pricing information on the driver please send the request here: http://www.ridgerun.com/contact