A raw supplier would need to synthesize it - I know of one that would do it but they would only produce a 5KG minimum batch. It was originally synthesized by Patrick Arnold and used by BALCO clients - then it was very widely produced and sold on the US "supplement" market prior to it's ban in 2009. So Chinese suppliers are more than capable of producing it - if there is a market.

Checking on the price for 5KG for sake of curiosity. Maybe it's cost prohibitive for one UGL to make the market - don't know.