Marx Plastic Canadian Pacific Questions

[Dominion Atlantic Railway]

 Have been trying to pick up all the Marx Canadian Pacific plastic cars.At present I have the gondola 339234 in tuscan,black and brown;box car 259199 tuscan;caboose 2366 tuscan and tender in grayish black.

 

 Heard stories that there was a plastic silver CP gondola and a plastic CP  hopper car.Any one know if this is true and if so where one mught find one of each?

 

 Have looked on line,but can find no information about these cars.If they exist I would very much like to have one each of them.

 

 Aloso does any one  happen to know if any other Canadian Pacific train cars were made in plastic or in other colours than what I have written??