My 350z is 2002 model does not come with rear view monitor screen. Where can l buy that l rear view monitor as the OEM monitors will no fit the compartment enclosure well. Also where can l get parts to upgrade the steering wheels to have steptronic control buttons ?
Where can l buy the original/compatible rear view monitor to be on the same original position ?

Original equiptment manufacture OEM. Year model 2002 350Z was not introduced yet. That said steering wheel controls for transmission upshifts and down shifts? l would not be making and breaking electrical connections that close to the air bag. rear view monitor there are units that display in the car is rear view mirror. Available on the parts aftermarket and camera on the licence plate frame.