Where can I get a Genuine Display Assembly for my 13 inch Mid 2012 Macbook Pro, and for how much?

So I have had my laptop for 3 days, yes you read that right, 3 DAYS and my screen has cracked due to an accident. There is also a dent in the corner, hence why I am looking for the whole display assembly rather than just the glass screen.

So does anyone know where I can get a GENUINE Display assembly for my MacbookPro? I know apple care will not cover this and that a repair will cost a fortune. I also understand that any work I do on the laptop will void its warranty, but that doesn't matter anymore considering the cracked screen has voided it anyway.

So devastated as I've had so much bad luck with technology over the past few months and have spent a fortune dealing with Apple.

The display assembly must be brand new, genuine and with warranty. I did some search on ebay but was not happy with the feedback most sellers were getting.

The Macbook Pro is a 13 inch Mid 2012 Macbook pro A1278.

Someone help me please!

Also, I live in Sydney - if that helps.

Additional Details
I forgot to mention that I have another macbook pro which stopped working. Should I just replace the display assembly from the old one with the new one? The old laptop's screen is in perfect condition! Or do I purchase a new one.

If I can avoid the apple store all together that would be great!