I do hope that you can convince the manager not to sell anything. These viruses (if that's what it is) can wipe out entire collections, and pose a serious threat to native reptiles. Discarding infected bedding outdoors could wind up transmitting the illness to wildlife. It's vitally important to contain the problem when it's recognized.
(I don't know what's up with the smiley face on this post, and I can't figure out how to remove it, so don't think I'm happy about this).