yo mel...check out this website for replacement parts
PDAparts: iPhone Service, iPhone Repair, Broken iPhone, iPhone Parts & iPhone LCD
they sell replacement screens (just the glass) and they also have videos of how to swap out the parts on youtube
ive found some of the parts on ebay for a bit cheaper, but u have to read the auctions carefully because their pics dont correspond with what they're selling, u may think ur buying a whole new screen (touchscreen/glass) but its really just the glass
hope this helps