I found a HUGE bag of these dense foam wedges (think garbage bag sized) at the dump here in Alaska one day (we have "re-use" platforms at 'em, I'm not a 'diver', so to speak), still have a couple hundred...about 3 inches thick, think the shape of a small slice of pie.
I'd be happy to mail a half dozen to a few peeps who do video if they think it'd help, I ALWAYS carry 'em in my taper bag, and I usually travel to the states twice a year to film as well (for the last 4-5 years, anyway)
PM me here or hagaralaska at gmail if you're interested.