go pro hero2 lens replacement


so here's the deal , I had my go pro out of the protective case , it got knocked onto our ceramic tile floor and of course it landed lens side down and now my lens is cracked on the inside and no longer any good..... I have found alot of youtube videos and information on taking my go pro apart and removing the lens , as well as installing a new one and adjusting focus.... but.... no real good leads on getting the new lens other than ragecam which is ridiculously expensive.... I have seen some sites that have replacements from China or Japan , but I can't tell if any will really work , and of course Go Pro is no help , they don't sell the lens , only offer a discount if you buy a new one...... anybody have any luck replacing theirs ??? PLEASE HELP !!!!