Sorry for the late reply - just now seeing your question. You can get from kefirlady.com, water kefir and milk kefir. If you are in the US she ships them fresh, if overseas she dries them and it takes a few days to reactivate them. You pay $20 cash after you receive them as honesty still does exist. :-)
I have bought both kinds from her and they were live and she sends detailed instructions with it and also offers email support.