Navico WD 200 to Simrad IS20 wind instrument upgrade question

[Reefmagnet]

I'm looking at upgrading the totally non-functional Navico WD200 wind instrument on our new to us boat with a Simrad IS20 system. I've looked at the wires coming down the mast from the old wind transducer and the cable has 4 wires and I'm unsure if it has a foil shield (probably not). It's impractical at the moment to feed a new IS20 cable (Simnet) down the mast, although at some time in the future this will be possible. In the meantime, I'm considering either joining to the the existing cable to connect to the IS20 wind instrument via standard Simnet or, if this is not likely to work, getting an NMEA0183 wind transducer and connecting this to the NMEA port of the wind instrument.

Anyone know if the above is possible, or other recommendations? Cheers.