That's the Redmonds site. I am not sure if their salt is available at retail stores. A while back I was going to order the Himalayan salt but it was too expensive for me, but this stuff looks like it is much better in terms of price!
I have heard Trapper speak of it before.
You can also jsut add some Sea Salt to your regular water that your drink throughout the day. I put about 1/2 a teaspoon in a quart and drink it when I am driving around or whatever.