It's illegal to possess cocoa leaves and extracts of cocoa leaves in the United States of America without a DEA license or prescription. [1]
It's possible that coca tea would work. [3]
[2] http://www.nutraingredients-usa.com/Suppliers2/Decocainized-...
[3] http://www.amazon.com/s?url=search-alias%3Daps&field-key...
[4] Hacker News really needs to get Markdown link syntax.