Dolphin Papers has been a paper supplier for over 30 years, and maybe going out of business.
So check them out before it is too late. They have a lot of variety and it is worth your time to look at their samples.
They have bookbinding papers from all over the world: France, Italy, India, Japan, Nepal, Thailand, and the U.S.
http://www.dolphinpapers.com
or check out their online store:
http://www.store.dolphinpapers.com