Yeah but we're not talking low-grade cheap half-cut drugs here now are we if you want people to actually live, we're talking high quality specialized production on a large scale and that means were talking big old production trails, or theft, theft from big old meanie corporations with meaningful political connections or god forbid a state owned soviet co-operative.

Doesn't mean it doesn't happen, so make scope for it, but it isn't as discrete and below the board as you know, pretty much everything else - hell I'd expect the legit companies that make it would probably be just as inclined to, er, "headhunt" from such operations while simultaneously stopping them eating into profit margins. 

I do believe though that I already said basic augmentation was "common" enough, particularly for specific tasks like industry that required it and most likely with some uptake among the rich and for other specialized roles like intelligence. Its just not widespread. If people need more than that then make it happen IC.