Looking for Garmin GSD 22 transducer info

Looking to add a transducer to a gsd 22 unit. The boat is used on basic Texas lakes and Texas bay areas. Any recommendations?

I have another Garmin unit that the head unit went out. I have the transducer but don't know the model/info;

Thanks in advance.

Nobody?

https://buy.garmin.com/en-US/US/p/288#accessories

Not sure if this is what you're looking for.

SE Kansas grass grower