Hi, Gynostemma Pentaphyllum leaves for tea is easily bought online. I think you will find it in the parmacies as well.

 I have only bought gynostemma tea online. My wife tells me that it is widly available in asian TCM pharmacies or in herbal tea shops in east - South east asia. 

Life Extension’s AMPK Metabolic Activator has both hesperidin and Gynostemma extract. They work perfectly together. I use this formulation