Rusty: I worked with Ron at American Models for the Frisco Meteor cars and it worked out pretty well accept he didn't use the right blue color and I gave him Lionel's paint number. Lionel said that they wouldn't make cars for the Meteor because their weren't enough engines sold for them do do a production run and break even.
If you look at the cars actually used for the Centennial Limited they were closer to the 650 New Haven Gilbert cars. I wonder if Lionel has tooling for those that could be reworked. Probably not.
It all depends on market interest and that is why I posted here.