First off: not possible given current game mechanics. Secondly, terminating EXALT already sees X-COM/the council/whoever flooding the market with a cheaper, more effective version of it. X-COM basically creates a drug cartel for the good of mankind. Why should anyone buy an inferior version of psiclone at that point?
1. Fine. I imagined it would be relatively simple.
2. You'd manufacture the new good stuff, not inferior. And yes the Council or whoever is taking care of it (but not X-Com unless you're actually putting engineers to the task). And you bet the Council is making a sweet profit from it, those bastards. So then have the council be angry at X-Com for getting involved in the selling and disrupting the market. Or write any fluff that works.
The thought of drugs being the only profitable item and X-Com hustling at it is just too funny to me, in a dark way. And it would be funny if there were some negative consequences. And if profitable Psiclone just doesn't work story wise, then make Storm manufacturable and profitable etc.