As we look for authentic, natural products, british soft drink brewer Fentiman's seems to fit the profile.
They define their beverages as botanically brewed.
Their tag line of 'Another year on the wagon' also shows they have a sense of humour. Amongst their offerings is the 'Victorian Lemonade' which illustrates this piece.
While checking their availability in the US, I did find that Mango's Market in Sarasota (Florida) sells their Dandelion & Burdock, Ginger Beer and Seville Orange Ginger. The price is $2.39 for a 12oz bottle.

I discovered them while reading Old Brands in New Bottles by Alicia Clegg in today's Financial Times (requires registration).