Some EDM Accord's with 4WS may very well be LHD. Many systems on the 4th gen lude can be adapted over to the 4th gen Accord with minor modifications.
I really don't understand how the system functions. I would venture to guess it's a steer by wire system for the rear. If so that should make it easier.
Problem is the only 4th gen Lude's I knew to be 4WS where 1992's and they where rare indeed. So locating parts would be a challenge to say the least.
Who knows I maybe wrong though. What I do know is that importing all those heavy parts is going to be a real bitch. I'd look to the local alternative first.