Find out. Check out your factory fitted options via the vin checker. I'm sure auto dining wing or side mirrors won't be on there. Failing that you could ask on the discussion section?
Adding a cover from your car to the new mirror isn't a bodge job. All the cover parts are interchangeable. Just screws. It makes more sense doing that, than buying a £150 mirror with housing in titan just because it's a colour match?
Either way find out before you go down a route, saves you buying anything that might not be right!