Reddit mentions of SRA Cases Pre-Scored Foam Block Insert For EN-AC-FG-A019 Case - 17.7 x 12.5 x 2.4 Inches

Cool,

now get some of this:

http://www.amazon.com/SRA-Cases-Pluck-Insert-EN-AC-FG-A019/dp/B00NPWLUHW/ref=sr_1_8?ie=UTF8&qid=1465072675&sr=8-8&keywords=foam+inserts

This is the foam I bought. There's no need to glue it down into the box because it fits snug enough.

https://www.amazon.com/gp/aw/d/B00NPWLUHW/ref=yo_ii_img?ie=UTF8&psc=1

The foam is made to where you can pick out each square individually. My decks are single sleeved in dragon shield mats, so each deck fits comfortably in a 5x7 slot. Make sure you measure out everything before picking out the deck slots. It's so easy to pick out spots, you'll have no problem making room for your accessories and life counters.

The token case I use is a hard plastic box I got from somebody on TCG player. It holds around 75 cards at full capacity, hopefully that will help find you what you need. The dice case is some random case my wife had lying around. I think it was a sewing kit or some kind of crafting kit.

Let me know if you have any other questions. Hopefully this case will protect your decks while turning some heads at the same time!

Here's what I used. It's perforated just like in the photo.

You could get some thicker pluckfoam, and let it hold the lid slightly above its natural resting point. It would still be "closed", and the foam would keep anything from crushing your ships. Something like this. I use pluckfoam trays for all my ships, and keep them stacked in a Gameplus bag, but it would certainly work in the box. The only ship that wouldn't fit in foam like this is the Ghost (I use a 3" tray for it, and 1" or 2" for everything else; Kylo's tight in 2", but a 2.4" like I linked here would be more than enough).

>I don't quite understand the difference between open cell and closed cell foam.

Think the difference between a sponge (open cell) and a styrofoam cup (closed cell).

"Pluck Foam" is a pretty popular product for applications like this. Basically it's open-cell foam with a grid cut into it most of the way through the foam pad. This lets you "pluck out" various squares to approximate the shape of the object you're wanting to protect. Commonly used when transporting minis for wargaming.

Not sure you'd find some that thin, though. https://www.amazon.com/SRA-Cases-Pre-Scored-Insert-EN-AC-FG-A019/dp/B00NPWLUHW/ this one is $11 for a bit over a square foot, but it's also 5x thicker than what you're talking about.

Acoustic foam might be closer to what you're wanting, it's certainly in the right price and dimension range, but it's also got that "egg crate" pattern that might be annoying for your purposes. https://www.amazon.com/acoustic-soundproofing-insulation-soundproof-dampening/dp/B076JNCQ39/

Upholstery foam might also be what you're looking for. https://www.amazon.com/Density-Cushion-Replacement-Mattress-Padding/dp/B074TTHFD8/