I got a white 2016 Mazda 3 Hatchback and looking to add the aerokit on it. The dealership gave me a quote for full kit for CAD2k, it was a bit high tbh.
Where could I get either genuine or aftermarket ones for lower price?
Above posts present several options, including OEM aero kit and not. If me, I would look carefully at the "not" and decide if you want those. If yes, then you will pay less. If you want OEM, you also have the option of telling your dealer, politely, NO, and immediately tell him, with your gently waving your credit card in front of him first, that you would be happy to buy it right now at 25% off (20% or whatever you think has a chance at being accepted).
I did that with my dealer and got a 26.5% discount (but shipping for you would be a major issue).