Tack Tick mn100 wireless Wind Anemometer

[Oceanis 440 NY]

Ahoy Mates,

I need to replace the wind cups on the anemometer on the top of the mast, only have 2 of three. Are the windcups specific to the the model or are these generally interchangeable? Big difference between a replacement cup and the Anemometer itself. 

Thanks in advance for your insight. 

Best,

Jon Schultz

S/V Ramble On