Does anyone know if you can upgrade to the $399 annual pass for DVC members from existing tickets that have been purchased for our trip Dec 10-15, 2012. The trip is not a DVC trip since we just closed a week ago on our DVC contract. We are paying about $320 each for our 5 day park tickets and it is so much mor cost effective if we can just pay the difference and have the annual passes for next year too. Any thoughts are appreciated!!!