If the wind noise is caused by the shape of the door mirrors and the door itself there is not a great deal that can be done about it, other than changing the door mirrors for a different type. However it could be that the door seals are not seating correctly or have become misshapen, so one option would be to have these replaced. It could be that the Vignale model uses a different specification of seal, so using the standard Focus type could cure the problem.