Where can I get, just a screen for an iPhone 6/6s?

I cracked my screen a few weeks ago and was putting up with it until a quarter of the screen stopped working and now it has become extremely difficult to complete the simplest tasks. I go away to school and my school's library offers to fix your phone for free if you supply a replacement screen, so I do not need a whole entire kit with tools to do it myself, all I need is a new screen for the phone.

You could try this: http://www.amazon.com/...00O8BW78A/

If you're willing to do some manual maintence this is the way to go unless you know a guy, alternatively you could go to the Apple store and pay $60 or whatever that's equal to in your country.

EDIT: Forgot to mention it comes with the tools to do it and my father used it once, but look up a video or something to help you.