"Carpet-schmarpet" That indoor/outdoor stuff is nasty. Alternative rubberized custom pad???
There have been a couple discussions suggesting a spray in bed liner in aluminum boats, It can be one of several light colors. A light color will keep it cool. The texture will be non-skid. It will quieten down your boat both from noises you make in the boat as well as water slap while running. It will greatly strengthen your boat as well. It will seal all those cracks where your dropped hooks jump into. Have a thicker layer on the floor with a coarse pattern with thinner side walls as it tapers to the top inside edge. The seat tops are sprayed as well in a medium texture. It will not add very much weight to your boat. All your hatches and opens will still work the same. That will greatly improve your boat and be warranteed for life.
The cost will most likely be about the same.
I am looking for a flat bottom boat so as to have this done just for the heck of it to show.