so, i remember someone was making their own gun crates (who was it? own up! let me cast some!) and always thought it a cool idea :)
just had some minis turn up from Nemesis (the Orphans are Dead Cool!) and they come packages in some really nifty little plastic boxes (http://reallyusefulproducts.co.uk/uk/html/onlineshop/rub/b00_07litre.php) that to me look alot like gun crates :D failing that, some objectives or whatnot...
Adept NPC demonstrates further uses...
(http://buildyourimagination.co.uk/minis/files/box.jpg)
without the base, he'd fit in there nice and snug; add some frosting effect and you've got a cryo crate :D