I have gotten, so I don't take really important projects (in-the-works or finished). I try to make sure I have a business card or slip of paper with my project bags, just in case. I put name labels on finished objects. If you don't have those, using indelible link on ribbon (satin, grosgrain, etc) can suffice. A phone number (if yours isn't changed much) or email, might be another good idea.
So sorry for your loss, but putting out good thoughts that it turns up. Some put things on Craig's List in their Lost & Found, just in case you haven't thought of that.
One woman told of her story of her yarn ball falling out of the car with her project intact. She went to several places and didn't notice. Once she realized this, she backtracked and rewound her ball as she went. Thought you might get a giggle out of that to lighten the load. I thought it seemed pretty ridiculous until it happened to me, but it was a short distance. I then noted the 'do not judge (in any way, shape, or form)' was duly noted. <S>