Created another thread...
I think that you can, but somewhere in the back of my mind is a nagging feeling that the curve at the front of the door doesn't match up. I don't know if you can just swap the fenders or not- you may have to splice the rear of the 4 door fender in with the front half of the 2 door. Then again, I could be totally wrong. Go get a 2 door fender and try it out.