At the risk of sending you to one of our competitors... You might also try Metalifferous in NYC. They have a little wider selection than we do of sterling bulk chain that you could use for making heavy bracelets. I _think_ they have GF also.
Be sure to tell them that Rings & Things out in Spokane referred you to them. (Seriously, one of Metalifferous' owners is a friend of mine. They have a great showroom for walk in crafts jewelers and students in the New York area.)