I just recently bought a 2016 Trax LS. I want to replace the stock am/fm radio with something better. I asked a local stereo shop for a quote to upgrade and they were unable to source the required interface modules that have been proven to work (they spoke of a module called Maestro). Does anyone have any advice on how I can keep features like the steering wheel controls and OnStar. Crutchfield (US) lists me all the needed components but the Canadian version of crutchfield doesnt seem to carry the same components so I feel lost as to what parts I need.