kefir in NASA (HOU) area

I'm dividing my time these days between Chicago and Houston (where I was born and raised and where I inherited a place in Friendswood when my mom passed away in 2007). I'm surprised not to find kefir (a wonderfully tangy cultured sour milk popular in Russia and Europe; it's all over Chicago, and I brew my own there with kefir seeds); it has proven digestive health benefits [more than yogurt] from active bacteria and uses in a lot of recipes [like cold beet soup, which is an ideal repast for the summer heat]. I figure that Whole Foods stocks it, but there's not one nearby. Any kefir sightings in the NASA/Clear Lake area?