I recently found an asian pattern that I dearly love. But finding the fabrics, that was work.
I got into my paint program and began pulling different fabrics into a window with the pattern and then cutting and pasting to find what would do what I wanted it to. It's taken a fair amount of the month to come up with the 6 fabrics I needed to do the quilt.
I'm thinking that the same process would probably work in reverse. That is if you found the fabric on line or can take you digital camera into the fabric store.