I don't think it's possible to answer that with a substantial degree of confidence. There aren't that many vendors for it, and I'm sure if the FDA were so inclined, they could find some excuse to shut them down, or at the very least, shut down their sales to end-users like us. In fact, I'm mildly (but pleasantly) surprised that they haven't already.So what's the worse case scenario date? For stocking up on nic