For gold coin grass go to www.sensiblehealth.com and call Julia Chang, she can help you out.
For hydrangea root, just do a web search, it's at any health food store. Dr. Clark recommends it.
For chanca pedra do a web search or go to raintree.com, lots of literature on it. It is the south american answer.
What you basically have is a chinese, american, and south american solution to disolving stones. All 3 are said t0 dissolve. I am using 2 of the 3. Chanca Pedra also lowers blood Sugar and is not good for a diabetic like myself.