This is what I use. I used to put my lithium shuttle in it, but have moved on to a Helix 10 at times and it fits inside too for great protection!
It comes with Plano type boxes inside, but I only use 1 in the winter for my tackle to free up space inside the bag. It is a pretty large bag, but I use it for my flasher, tackle, lights, release tools, etc. It also doubles as my summer tackle box when I am not chasing Skis.
It appears they may have stopped production, but there are a few sites with stock online.