where to get seerapeptase

I am very interested in getting seerapeptase for my husband. I searched it on google and only one place came up for it. Their tablets were 20,000iu and 28 in a bottle for $39. According to what I've read on this forum, he may have to take up to 160,000iu twice a day. That would mean that on bottle wouldn't last even last for 2 days. Can anyone please tell me anywhere else to get it? Thank-you Tweet