I ordered 20g's of pure tianeptine sodium (AKA Stablon) from a chemical manufacturer in China. I'm capping them up myself but have enough for over a year. If anyone is interested in purchasing some of it send me a message.
I can either send you some pure powder or I can cap it for you (I use pharmaceutical grade Microcrystalline cellulose as a filler in the caps). The caps contain 12.5mg (accuracy to about +-0.5mg), the same dosage as Stablon brand. I won't sell pure powder to anyone who doesn't have a scale accurate to 1mg.
As far as purity, all I have to offer is the COA provided by the company and my personal experience. As far as I can tell the effects are the same as the Stablon product from Servier.