Unfortunately the silver bezel is the foundations of the phone, it's not a plastic surround/perimeter, there's plastic all the way up and down/side to side inside of it, the circuitboards are screwed into it and the screen is glued onto it, you can undo the circuitboard I think, but there's no way to remove the screen without cracking it.
You can buy the bezel by itself without the circuit board and then get a screen or you can buy them pre joined on ebay. You'll have to remove all the circuitboard stuff and put it on the new bezel though.