You can get the same amount of KI by taking 3-5 grams of kelp each day and you can get this at a vitamin or natural foods store.
My grandmother’s four sisters were within 20 miles of Hiroshima on August 6, 1945. None required medical care and they all lived well into the 1980s.
Nature’s Life sells Icelandic Kelp tablets. Local natural foods store sells a 500 count bottle of 41mg tablets for about six dollars.