I find it very hard to recommend an Miracle-Mineral-Supplement seller as they appear to come and go without warning. Which likely has to do with the ongoing ban on Miracle-Mineral-Supplement related products.

That said, I'd have a look on eBay and see what can comes up.

Additionally, I'd recommend finding a dry form kit rather than the liquid types as they tend to have slightly better reliability in terms of potency and as well as better storage potential(in freezer).