Black and White: Zombicide walkers

Here are few Zombicide walkers with the grayscale treatment. I like'em! They remind me of "Night of the Living Dead (from 1968.) And they're not difficult to do. It's mostly overbrushing with a little but of drybrushing, and then going in and picking out a few facial highlights. It's difficult to get any high-contrast with the clothing (I just need some discipline on my part.) But I prefer them to be more analogous anyway (to blend with the masses.)

So I'd like to do the remainder of them, but my only problem is I'm not sure how to store them (economically and without adding extra boxes.) For now, the unpainted figures are all in ziplock bags, but I don't want to bag up painted minis (even if they were this easy to do.)

I've seen the Battlefoam trays -- and the price is right -- but they don't look they'll hold all of my Season 2 zombies.
-- Speaking of which, I also decided (but haven't tried out yet) a way to do the toxic and berserker zombies: Monochromatic. Toxic zombies will be (a muted) green, of course, while the berserker zombies will get a nice earth tone of some sort. First thing's first, I need to look at all my storage options.