[vintagesteel]

In missouri, who ever's name is on the title has to apply for a lost one. So it probably won't do you any good to apply. You need to go there and talk to someone to find out what you have to do. It doesn't matter if she signed the title or not. If you can't find the original, she might as well not have signed it at all. If your aunt is in charge of her estate, maybe there's something she can do to get the title.