Looking for replacement unit for GP 1650 DF

I bought a boat last year that had a GP 1650 DF installed at time of purchase. Is there a newer replacement unit that can connect to my existing antennas and transducer, or will I have to purchase all these separate for a newer unit? Hoping there is something like "plug and play" that could simplify the upgrade.

Take a look at the GP1670F or the GP1870F. You can use the same transducer and antenna, but they contain a built-in GPS/antenna.
The GP1670F is a close fit to what you have, but check the measurements on to see what fits your needs the best.