To clear things up, sorry, we sell the JDM switch/stalk here. Not the canadian. I do not think the Canadian Z's even come with this rear fog lamp, so there would not be anything on their steering column switch that would even work.
According to all my sources, the only Z's that have the rear fog light from the get go are JDM and Euro models. (I may be wrong).
The version that you will need that has the switch for the rear fog, and keeps everything specific for the LH drive models will be from a German 370Z.
UPDATE: We are ordering in from Germany a steering column switch for testing here in the states
questions, just pm me!