I just bought this today at Walmart:

I'll be planting these tomorrow!
I was at a farmers market. A fellow had stevia plants, or their leaves, for sale. He gave me a sample of leaves to chew. They were really sweet, the real deal. I imagine if you harvest the leaves, soak them in a small amount of hot water, you’ll have a stevia simple syrup to use.
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I emailed them a couple of months ago asking about the country of origin for their stevia. This is their reply:
Thank you for your message. None of our stevia is grown or sourced from China. Our stevia comes from various origins, including Mexico, the USA, and Peru.
Their product is more expensive but you get what you pay for.