I recently purchased a 1996 Catalina 320. It has a pretty complete set of Raymarine ST50 electronics, but is missing the wind vane/speed transducer that screws into the masthead. Raymarine says they have no replacement parts, so I need to replace the entire weather station with ST60 equipment ($1000+). I've read that you can use the ST60 wind vane transducer, but it can't be calibrated and may not provide windspeed. Does anyone have any suggestions? I would put a used but working transducer up there if I can find one.Thanks!