Hey there, I've had a hard time finding Cinchona Bark for, you guessed it, making my own tonic. I've tried Christina's Spices in Inman square, Cambridge Naturals in Porter, and the Modern Homebrew Emporium (they were quite a stretch but on my way home). Does anyone have any trusty sources that they know keep this stuff in stock? I need to reach out to Penzeys, they're probably my best bet. At this point, I'd take either the bark chips or powder. Thanks!