The information is on here somewhere about the swap, I remember seeing it a few years ago....just keep looking. If I remember correctly, you will need the M fender for sure and likely the M hub. I'm not sure if the headlights are interchangeable, I think I remember the M having different mounts for the brackets. The 200E and 200ES forks are a Honda engineering flop IMO, even after you get them apart, you will find yourself asking "why".....when there are conventional forks available? it makes no sense. As soon as I find a decent M front end I will be doing the swap to my ES also.
Don't worry...just run watcha brung...