I’ve seen Kefir starter at PCC. It’s on the far right wall, across from the bulk foods, and immediately next to the freezer. Top shelf. It’s about $7 for a huge package. I was going to pick one up sometime soonish. I can let you know how it works, or if you find some in the meantime, will you keep the rest of us posted on how it works out for you? We go through about two cartons a week of kefir, so it would be MUCH cheaper to make it.