Sadly I don't have time to make that Gluttony costume I kept thinking of. (Ahaha, I always thought making one would be grand.)
But for those cosplaying Al, I have a few tips. I've been testing some 'armor' peices for making my Chocobo costume some armor, and I found that you buy white foam sheets (You can get them at craft stores like Craft Warehouse, but they aren't all that cheap, nor that big =/ I'm looking for a place to get them larger.) and you sculpt the armor out of that- then spray paint it metalic silver or whatever color you find works best. It weighs next to nothing when you're done with it, too. However I'm not sure how durable it would be for a 3-day-con. :?