I am not affiliated with any company, but there are a few companies that I like to order from. They both carry a very nice gluten-free light buckwheat flour and have very good customer service.
Happy Baking!
Michelle
The Granary
920-830-3311
2125 North Richmond St.
Appleton, WI 54911-2773
Bouchard Family Farms
800-239-3237
3 Strip Rd.
Fort Kent, Maine 04743