Yup.

http://www.ebay.com/itm/New-15-LCD-Screen-Display-For-Macboo...

yes, but its not optimal, you can get LP129QE1-SPA1 for third of the price

The point is what will drive it? There's a driving board for the 15" Mac retina display.

both screens use eDP, you can drive them with ordinary DisplayPort, all of those those "driving boards" started with Polish Warsaw Hackerspace dude (Emeryth) publishing his findings concerning ipad screen

http://emerythacks.blogspot.com/2013/04/connecting-ipad-reti...