Where to find kefir culture versus grains or starter kit in GTA???

I'm interested in making kefir but have read that if it's best to find the "culture". The question is "where"?

I read this on a site on the subject:

"The easiest way to obtain some kefir culture is to get some from a friend who is making kefir. Try to obtain kefir grains, not just a "starter", which is sometimes sold. Kefir grains can be used "forever", whereas "starters" can only be used 7 times or so."

I'm completely confused now... Is it culture, grains, starter?? Help!!!!

I know Noah's sells a starter kit, but if anyone else can offer some direction on where I can find these magic beans that apparently resemble "cauliflower", I'd be grateful.

Thanks.