I saw that you had a trip planned for early December, so have you already gotten back from your trip or are you still at DLR? If you're still at DLR, then there were new buttons available in November at the Cozy Cones, Ramone's, and RSR. The information is in this thread: http://www.disboards.com/showthread.php?p=49811694#post49811694
If you're not there, then there is also a Collector's board on the Disboard where trading threads normally appear. Trading threads are allowed, but sale posts (offers to sell or offers to buy) are prohibited here on the Disboards.
So I just got back from Disneyland and my nephews asked me to bring back the cars buttons, and completely forgot. Mainly because we were too busy with the princesses.