How heartbreaking! Call the local news stations and newspapers. One may do a show about your plight. Don't give up calling and emailing every high up exe at UPS. Be a big pain in the butt! Someone has this quilt whether the box was lost or misplaced, someone has procession of it. A local quilter had her quilt in Paducah several years ago. She packed it in three boxes, each bigger then the next. The box was too big to lose! She took pictures of the packing box at the UPS office, all labels and even the clerk. I read that there are tiny GPS thingy that can be used to sew in clothes. I think that would be excellent to use in any quilt going to a big show. It cost a fee to activate the GPS but the location can be pinpointed, like the new cell phones can be located if lost or stolen.