We are in the process of completing a test that will allow us to produce custom freight and passenger car decals in runs as small as one set. That stated, if you have a decal you would like to have, please send a message to get the ball rolling. A quotation can be provided along with a preview of how the finished product will look. One additional note is that this custom work applies to all scales, not just HO. If it is a road where there is existing artwork, it can be a relatively quick process. If it is a new project, the timeline may be longer, possibly several months depending upon complexity.