This site specializes in train fabrics.
http://www.trainfabrics.com/storenam...pt-171863.aspx
If you are not comfortable ordering from them, you can use the site to find the name of fabrics you like then search for them.
There was a line of steam train fabrics made from Currier and Ives prints that came out a year or so ago. It is getting harder to find but it is realistic and has several coordinating prints.
http://www.trainfabrics.com/storenam...pt-270676.aspx