HGH (human growth hormone) is available from lots of sources on the net (no suprises that they all seem to be American) but good luck if you decide to go down this route......it doesn't actually stimulate growth as in height gain in adults but it promotes a faster metabolism and helps your body repair itself quicker and gives a more youthful appearance.....as wildwood says they only certain way of gaining a few inches is to wear calipers and have your legs periodically broken, pulled apart by a small amount then let them re-set, and repeat till you achive the desired effect though I would think you'll have a very hard search to find a clinician who'll untertake this procedure for you.