Does anyone know the specific part# for the 997s transducer and Gps Antenna. I want to be able to use my 997 on my other boat but have to install the gps puck and transducer first. Dont need to buy a whole new 997. I can only use one boat at a time. I went to the humminbird web site and I cant seem to locate it. The transducer would be a transom mount.