looking at your pic on your sig your car looks to be a pre-facelift so if your going for genuine items then you will need the whole mirror assembly not just the covers as the pre-facelift mirrors are different to the facelift, however there are also the in-pro replicas that are for pre-facelift but still be carefull as they also do facelift ones too, your need the ones from 1996-2000
i think there might be some pre-facelift genuine ones out there but are very rare so doubt your find any