It can only be ordered over the phone or by mail:
http://www.allearsnet.com/din/dde.htm
MEMBERSHIP AND CARD INFORMATION: Call Disney's Dining Experience office at (407) 566-5858, Monday through Friday between 9 a.m. and 5 p.m. Membership is not available on property. Membership is only available by mail or phone.
BY MAIL: Disney's Dining Experience, Post Office Box 10000, Lake Buena Vista, FL 32830
BY PHONE: (407) 566-5858.
NOTE: Allow 4-6 weeks for processing. If you will be visiting Walt Disney World before you receive your membership card, DDE will fax or mail a letter of authorization to your home. If regular mail or fax isn't practical (e.g. your trip to WDW is within a few days), or if you're already at Walt Disney World, you can arrange to pick up a letter of authorization from a Guest Relations office. You will need to show a photo I.D
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You could call when you get your AP and have the letter mailed to you for your next trip or pick it up at Epcot after 5:30pm. Are you sure you can upgrade your MYW+ when you have already used days? If it has plus options, you may only be able to upgrade to a PAP and they may backdate it to the first day you used your MYW.
