It is easy, on the net, to find how many base model or gs or zo6 or zr1 where sold, but how can we know how many are canadian (rpo z49)? I am trying to find this info since I have the car (July 2012) but can't find it. Canadian cars seem to have a few different rpo tha I can not find any definition. Any Idea or sugestion? rpo dns?, 6X1?, 7X1? z49?