sashiko

Sashiko Supplies in the US?

I have a lovely book on sashiko embroidery - but no real sashiko supplies to try it with. I'll tinker with my cotton embroidery thread and thick needle until I can find the real thing. But does anyone know of a US based supplier for the thread, needles, thimble, premarked patterns/fabric (for a beginner), etc.? thanks! Amy
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