Probably not, it has mostly been replaced by benzodiazepines in terms of all but one of its functions.
Anyone who can get it is likely a company who is unwilling to sell it, people who aren't involved in the companies that produce it likely won't be able to get their hands on it, and even if they could most drug dealers aren't willing to sell stuff that isn't profitable. Hell, it's an obscure drug, we are one of the few groups who would even know of it, genuinely care about it and want to get hold of it, the other groups being the businesses that work with it and law enforcement, and I suppose drug users who want to try "novel drugs".
KL was a rare exception, most people do not sell things specifically for people to commit suicide with them, that will just put them on the police's radar and will not be profitable. Hell, KL WAS on the police's radar, he just argued that he wasn't selling anything illegal, nembutal is regulated in most of the world and thus is an illegal drug in any case. Let us sell this illegal substance that is incredibly difficult to obtain in the first place and is only appealing to a customer base that is unprofitable and likely to get us arrested!