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Have you tried Whole Foods? It's available at the one up here (Vancouver BC).
for sourcing questions, i always suggest that someone log onto www.chowhound.com, find the area board for you, and ask that question. chowhound is a huge online community of foodies.
also ask the question on their General Topics board in case your local board doesn't answer
black garlic is not common. i have bought in CA. Website of Sanctuaire sells it too.
http://www.aliexpress.com..., u can place the order online
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