Where can I buy a silk cord/chain for a pendant in New York City?

I recently bought a pendant that came with a short silk cord/chain. The pendant is very nice and I wish to keep it rather than to return it. I would like to buy a longer silk cord/chain to replace the one it came with.|||your local fabric shop, or hobby store will have silk cords...(Hobby Lobby, JoAnn (fabrics), Hancocks, AC Moore)|||You could order the silk cord/chain at Amazon.com