Board Thread:Questions and Answers/@comment-24139250-20141014063225/@comment-24094162-20141014095910

You should check all of your trains, in your depot, on your local tracks and your international sets. If you don't see them from a quick look and can't buy them meaning you already have them, they have to be in one of those spots. So break down everything and rebuild it all to make sure it isn't lost on a train you didn't realize it was on, it has happened to me more than once :)