So at some point I went on a loose leaf herbal tea buying spree and bought (and almost immediately forgot about) something called "catuaba". I tried making it into a tea and it was... an acquired taste. In my efforts to make the product more digestible I mixed it with some sparkling water.

The result tasted shockingly similar to coca cola.

So I did some research and it turns out that what's labelled as "catuaba bark" actually refer to a couple different unrelated herbs. But ONE of the sources of "catuaba bark" is Erythroxylum vaccinifolium. Erythroxylum is the coca genus. I have no idea if this specific species contains cocaine but what I CAN confirm is that there are sellers within the US that grow and sell this "herb". Which means you don't have to worry about customs intercepting your order at the border.