I've seen on these boards and on mousessavers that you can get a 10 day pass but I never see them advertised on the Disney site or in their pamphlets. Thanks!
Try clicking on "Tickets and Reservations" at the top instead of toward the middle of the page where you choose rooms, packages, or tickets and has drop down dates. I could only find the 10 day prices at "Tickets and Reservations."