Nexus 5 damaged camera lens topic

Hi,

I accidentaly dropped my Nexus 5 before few days and camera lens is a damaged, not to much but enough to annoy.

I was watching few videos for replacement and it doesnt look too hard.

Where I can buy original part for Nexus D821, I was looking on ebay but I'm not sure what is fake or original...

There are parts for 9$ like this:

http://www.ebay.com/itm/Black-Back-P...item1e8ecd2955

or "same" thing for 24$ :

http://www.ebay.com/itm/Original-Top...item20e384a2ae