I can get you from Colorado and I know my mom will send one from Arkansas. Just let me know and I will get them sent out ASAP.
My daughter's class did this as well. They took a huge map of the states and hung it on the blackboard. As the cards came in, they taped them to the map according to the state the card belong to. It was really neat to see when the last card came in and they were lucky enough to get all 50. I hope your kiddos class is just as lucky.