If its the front of the phone those $10 Ebay front glass kits wont work. They sell you the glass only and you cant replace just the glass, it has to be the glass with the LCD Digitizer. There are a couple that work but the parts are not OE. I got my front repair kit from iFixdirect.com. I did it myself but it is kind of a PITA to do as you basically have to take the phone apart peace by peace.
Does anyone have any idea how much Apple would charge to replace a screen? Just curious...