since you have had no luck with non gen parts, I would take the dizzy to your local nissan dealer and if it is not your original dizzy ( I am guessing it is not) try and get the engine number that it came out of.
Just had another thought is the dizzy out of an A series motor ? reason I ask is I used Honda parts for my dizzy apart from the body and shaft all the internals are the same as EB1/EB2 1200 civics