Original iPhone OEM glass & bezel replacement

I have my original iPhone that's in (just about) mint condition other then a small crack in the glass, and a small ding in the corner of the chrome bezel. I am keeping it as a collectors item but would like to get the glass & bezel replaced with OEM parts..What would be the best way to go about this repair? Am I better off trying to get my hands on a broken phone with a good screen? Or is there a place where I can just buy the front glass and bezel. I'm guessing that the digitizer is fused to the glass so I'll need to replace the whole unit.

If someone could point me in the right direction, I'd appreciate it. Also, I'm pretty handy so I think I can do the job no problem.. But what would u say the degree of difficulty is on a scale of 1-10. I never had the need to disassemble any iPhone so I have no experience. But again, im sure I can handle it. Just need to know the best way to go about doing it.

Thanks!!