I usually go here:
http://www.quiltshops.com/ to find my fabric. I either go by style, color, or I have the name of the line I am looking for. I type in what I want and then the word SALE and it brings up all the quilt shops that have what I want on sale and I look for the best buy. I have purchased from many different shops and have never had a problem with the item or the service.