You are too far away from me but
www.nissan4x4owners.co.uk would be a good place to start. Post there FAO Shark1e. There is a lot of inetrest in winch bumpers (or lack of them) for terrano's at the moment, and I'd like something that could replace the (tatty) standard bumper, includes some recovery points, but still blends in with the looks of the terrano. Don't need a winch, i use a Tirfor!
And you are right, there is a serious lack of suitable parts fro Jap 4x4's.
For ideas have you checked out the ASFIR range?