I have a Md104ll/A mid 2012 2.6 i7 with the normal resolution glossy screen that I could not stand the reflection. I also have a MD385ll/A with the hi-res matte screen that I'm accustomed to. So I compared the connections to see if modifying the 2012 to Hi-tes matte would work. I found a late 2011 hi-res matte screen on eBay and pulled the trigger to change the screen.
Remove and Replace is very straight forward, however in order for the connector to seat properly, I had to trim the video cable connector coming from the screen. I used a small nail clipper to cut off about 1mm of plastic, then swapped out the retainer clip. Once I got the connector seated correctly clipped down the clip, reassembled then tested. It works!!
It can be done on 2012 non-retina display MacBook pros with glossy normal res screen, with very little modification. The whole job took about 40 minutes. Cost with shipping under $100