Several people here have recommended I buy some starters from sourdo.com, but I have to say, I'm not sure why all the recommendations. I find this business to have atrocious customer service practices, ranging from indifference to all-out disregard for customers.
When I did receive replies from them, their responses were rather curt and not especially helpful. I'm on the verge of telling them to shove it and cancel my order.
Sorry, but I can't recommend sourdo.com to anyone until they start engaging in better customer service.