If you change your mind, I looked on Amazon (expensive) the "local chain" I like ( that isn't local to me) Fields Fabrics (mostly sold out).
Equilter does have some yardage (but very little left) for standard type pricing and a couple of panel options which can sometimes make cool pillow cases. Best way to search seems to be just the word "Thomas" and look for the trains.
https://www.equilter.com/