Changing Display with frame for a D820 on a D821

Hello everybody,

yesterday I broke the Glas of my Nexus 5. The touch is still working, but the glas is broken hardly.

So I was looking for replacement parts and after a ot of search, I landed on this site http://www.etradesupply.com/lg-nexus-5-d...

I wanted to ask, if there is any problem if I use the d820 screen with frame for my d821? Did anybody do this repair? And does anybody evev bought parts from etradesupply, are there products really OEM?

Thanks and greets