I don't know if this was made, but if it wasn't here is a good addon for the up passenger trains. The 844 challenger and big boy. There is something that is missing from this passenger set, the UP box car that is on the passenger trains on 844 and big boy. There is really no history about it really but that box car is missing from the whole set. If the box car can be made that would be great to finish the addon. It can be a marketplace addon for it. I hope this will be made. Here is the link to see the box car included in a UP passenger train.