Hi,
They (the wipers) are 45 cms or 18 inches. Believe it or not Halford stock them (including the aerofoil on the drivers side).
As for the window, the drivers side is alway the first to pack up as it gets most use. When you push the switch, is it even trying to turn? You should be able to hear/feel if it is.
BTW this is a difficult part to come by if is is totally fooked