I'm sure there are people here at Android Central who could help but you might want to try posting in a forum for Apple iOS where you'd probably get a better response!☺
iPhone 4s screen (digitizer and glass) is about $240 - $280 at the Apple store. If it's only the glass it's about $130. My niece just replaced the glass only (in Hawaii) and this is what they quoted/charged her.
Apple used several LCD panel brand for their iphone 4/4s such as LG LCD panel, Toshiba, Sharp and Tong bao, no matter which one is always best and original quality. ifixit can help you.