I have had simular luck here in the local thrift stores while looking for a cub scout shirt for my son. I have been able to run across no less than 15 cub shirts and about 5 or so scout shirts. (Unfortunatly none that will fit my son) However, I got all that I could find and will gladly loan them to any of the kids localy that can use one. Had better luck (size wize) getting him a shirt off Ebay though.
James