Ron,
They normally do multiple numbers for these cars Last time they sold them in sets consisting of a combine, baggage, and baggage/mail. There were two different sets. Some dealers broke up the sets and sold the cars individually. This time Scott is doing them separately which I think is a good thing, Maybe we'll see four numbers and your express mail scheme.
I spoke with Scott at York several years ago about doing additional baggage and RPOs so prople could model express mail trains. Bob Heil was there and agreed with me.
If everyone would vontact Scott and let him know their interests, Scott will likely produce them.
Jan