www.ifixit.com, you should be able to find what you're looking for there.
and fyi, Nexus 5 digitizer and LCD stick together, so you're gonna be facing a pricey replacement.

Alternatively, you could find LG service center and see if they have the parts to replace it for you.

This post has been edited by thomasyke: Jan 6 2014, 01:15 PM