There are so many interesting things on this website that I admit I start browsing and quickly feel overwhelmed. For the purposes of Fashioning Circuits, I find the “E-textiles” section very interesting.
I have never ordered from them, so I can’t speak to customer service. I’ll update this when I have a chance.
Update: Lots of us at Fashioning Circuits have been getting our supplies from SparkFun with really positive results. They ship quickly and the stuff arrives in good shape.