I need a CNR prototype to match the model

[cnrglen]

I'm repainting a Rivarossi diner car that I bought from another modeler's estate. He added the extra kitchen door on the side, probably to better match a prototype Canadian National car but try as I might I can't find a close match on the internet or in my library. Can anyone help?

I thought I might semi-match the 'white' café-bistro cars but those had a rounded 'turtle' roof where as this has a clerestory.