I don't think you can induce lactation without having been on progesterone for a while, which is necessary for some glandular formation. Also, you'll want to have been on hormones for at least a couple years. And, of course, you'll want to consult your doctor -- dropping your hormones can have repercussions on other aspects of your health.
I knew a woman who was completely flat-chested, up into her early thirties, and only developed breasts when she got pregnant. I doubt a physician would go for a simulated pregnancy, though.