Some of the links provided in post #3 to you are for bath salts. Be careful what you order. Though I have read that pure bath salts are the same as food grade, I would be careful, as there was a young man here in Florida, who in the past couple of years turned cannibal and ate someone's face, as well as biting another person, killing them both, after supposedly somehow using bath salts to get a high. As I wrote in another thread, there is a vendor on amazon from Israel that is selling food grade salt from the dead sea, with good feedback.
I would also give your normal supplier a few days to get back online. They might simply have a server issue or bandwidth overage issue.