If there is any way the serial number can be traced, the tickets can be cancelled and replaced. You could find the serial number possibly on your recpt. ?? Possibly the official ticket center would have a record of your serial number. If you didn't lose them ALL, you should be able to trace them with the serial number of the ticket that you have, but I gather they are all together. I hope they turn up or get replaced. Disney will try to help you if they can. We lost one and they were able to determine the serial number from the other ones and cancel and replace it.
I hope it works out!!!