I have the "Morning Train" as well. It is a beautiful set. According to Paul Fischer (an expert Milwaukee modeler) the interiors are standard Pullman-Bradley interiors from Weaver. He extensively modified his cars in this thread. I also wondered why the cafe car had no interior. I presume the answer was that Weaver had a coach interior from the P-B cars, but didn't have a diner or cafe interior. So it was better to blank the interior than to insert coach seats into a cafe car.
Here is a link to the catalog in which it appears from 2005. This catalog says "detailed interiors with seating" but the 2006 catalog qualifies that the cafe car has "tinted windows and overhead lighting." Some of the Weaver passenger sets had 2 add-on cars, but I've never seen one for this set, nor is it in the 2005 or 2006 catalogs. I lengthen my train with one or more of these:
The last (orange) Lionel milk car is a recent issue and is likely still available. The others were special runs from the Lionel Railroad Club in Milwaukee and are hard (or expensive) to find.
glacier runner,
Here is the "Beavertail" end of the observation car:
Bob
