Notice the protective tape on the bottom insulating the contacts under the tape. Try not to tear or damage the tape or underlying contacts on the new camera module (But when you are removing the old, broken camera module, ignore.)

eBay has them for <$10 USD.

You can also buy a cheap broken or used LG G2 that has a working camera module and salvage the part from that.

Once you've done this replacement, you'll know just how easy it is and it'll take just minutes. But for the first time, especially being careful, it may take up to half an hour to disassemble. Relax - as long as you don't manhandle it and break a cable or connector, it's easy as can be.