When we stayed there last year there was a pin book at the back of the Gift store near the area with groceries and toiletries. I dont think it has changed but you can always ask a cast member when you are there. Have fun .
There is pin board at the gift shop...a rather small pin board. It is brought out twice a day around 12:00-12:30pm and around 5:00-5:30pm. Depending on the CM who is working you can see the board at other times. We had one CM who treated us like we were asking to handle the Crown Jewels when we asked to see it during the unofficial pin times. Even then the pins looked tired and picked over. I hope you have better luck than me.