Here is another anemometer / vane that someone may consider. As it is a direct replacement for the Davis then it should work assuming the pinouts are changed from Davis on the RJ11 to the TX RJ12 mentioned in previous posts.
http://www.darrera.com/en/detalle-produc...d=1&id=229
http://www.darrera.com/en/detalle-produc...d=1&id=229

