Cuddledown has blue willow watercolor sateen sheets, duvets, shams, etc. for sale in their new catalog. They don't mention "blue willow" at all in the title or description, but instead call them Sayuri. You can see them online at http://www.cuddledown.com/itemdy00.aspx?t1=Z50238%20193%2031%2004

They are not economically-priced, but maybe they will go on sale later!