We have a 2015 Carthago Tourer. Does anyone know if we can change the n/s wiper blade. The MH is right hand drive and the passenger side wiper does not clear a large part of the lower windscreen. I am only 5ft tall, and as I do all the driving it causes a large blind spot in my field of vision. It looks as if the blade should be longer at the bottom. Are such things available?