Here it is - the small Ferry!
I've have converted it to FS19
The mod consists of 2 parts - a Ferry, and a port to it.
1. Unzip the file first.
2. The FS19_Ferry, in the mod folder.
3. Install the Port using the Giants Editor.
4. Adjust height of waterplan and terrain.
The Ferry can be purchased under misc.
I hope you can use it in your Map.
Have fun :-)