Thanks helicrazi
I am not sure that a dunker should be acceptable for type specific EEJ, I recall going through the Southampton dunker a few years ago and (I may have a fading memory) but think the window on that was just held in place by velcro so hardly a realistic representation.
I have not heard of dedicated training doors, are these common? They make sense I suppose as it removes the potential to damage the actual aircraft but it is only really effective if it is an accurate model of the real aircraft including seating position.