Well, MT is offering this model (with the arched roof) as a Canadian Pacific observation car, item #144 00 085, its in their May releases. This may help some others gain the model or models that they might desire since this should help to make it fairly easy to find by stock number. I'm good... obtained my last three earlier this month at the annual trainshow so while I am glad that they are doing this, I don't need any more.
Makes me wonder, though, if they might be offering some other roadnames with this roof?