Yes, you can buy a gimbal bracket swivel. Cost around $15 for my lowrance. My humminbird also has a quick disconnect if you wanted to mount two transducers and move it from the front to the back of the boat too.
I rely on my bow mounted fish finder to put me over structure and find the drop offs and ledges so I don't think I could look back in the boat all day. Besides you can pick up an inexpensive finder for less than $100 if you had too.