I was loooking at the new Ranger C boats and came up with this idea. It works really well.
Here is the template I made out of card stock as a test fit over the front of the recessed tray.
Here is the tool holder I cut out of 1/8" rotomolded plastic. It is held in place with the screws that mount the trim around the recessed tray.
Here it is with my pliers and scissors in place post install.
I haven't had any problems with tool coming out while running down the lake or running rough water. More tools could be added by cutting in additional holes.