Sources of unrefined salt on the web:

Click on the link. A little more than 1/2 way down the page is a listing of 9 or 10 companies, their phone numbers, and if available websites.
//www.curezone.org/foods/saltcure.asp

Also, check out the following link. About 1/4 way down there is a blue section with 4 columns and 4 rows and a lot of topics to click on.
http://watercure2.org/index.htm