Day Runner offers the following items which will fit your Coordinator. Item #'s 061-785, 068-785, 481-185, 481-785. These items are available on www.ataglance.com as well as www.dayrunner.com. websites.
Mead has elected not to stock a custom David Allen 2010 calendar refill only product; you can customize your coordinator with the 2010 calendar of your choice.