I found a supplier in Warrenton, VA (less than an hour from me) and there will also be vendors at the Homesteader's Convention in Oct. 2018.
For the flax? If so, I'm guessing you would buy a few bags so you don't have to travel back and forth. If you do that, have a dry place to store it because I believe across the board it comes in brown bags, which is not water friendly.