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Did you even try google? Enshure: http://ensure.com/products/ensure-complete-shakes click buy online from the product page. Fortisip: http://www.fortisipdrink.co.uk/ . Again, click the buy online link from there homepage. (Though I think this is a UK brand.) PS: You can find a wide product range at http://abbottstore.com/
Did you try reading the thread you are attempting to participate in? The whole problem is vaguely claiming that there's already products that cover the use case of soylent, but not giving a specific. None of the products you linked to provide 100% of known essential nutrients. None of them are intended to be used as a replacement for food, and none of them can be used as such with long term safety. It is absurd to se…
You keep making this claim and it is just not true.