you might try this site for ideas.....sometimes quilt fabrics have vintage prints......also you might just make the curtains out of a material to match and put a strip or border with 'stamped' laundry items...

Here is a link that might be useful: Laundry ideas

also check here for ideas of what you could use to 'stamp' on the curtains. Also you might find pics online and then print out a transfer to iron on.

Here is a link that might be useful: more info