The rear wipers are proprietary. However, some members on the Mazda3 Forums are trying to just get blades and cutting them down to size. I hardly ever use mine and condition them every car wash and they still streak.
For the front, go with the Bosch Icons, like Nliiitend1 said, or the Valeos, Rain-X Latitudes, or Michelin Radius. They all have similar technology and are super nice. I've had the Bosch and Michelins and they perform the same. I get the one that's on sale