Gords link should help as they have a Dataline replacement. It's the whole setup as you can't service parts
on the transducer. Transducer replacement would be the lower cost, but wiring
often is the problem.
I saw some new pricing on TackTick too for a wind only. Don't forget with TackTick the installation
is no more than a attaching 3 threaded bolts to the masthead for mounting. After that it's a 3 minute job. Pulling the mast to rewire the the transducer would allow you to have at all the rest of the wires but it's a big job. You can't just drop the wire down the inside and grab it at the bottom.