Breaking news. The Alpha/Bravo masks are available for pre-sale:
http://gear.ea.com/titles/army-of-two.html
We've asked for editions of 50, of which only the first half is available. We haven't heard back yet if they're leaving themselves open (Evike or EA) to making more or not, so they're not numbered and I can't promise more won't eventually exist....
The second half of these masks should be available in a couple weeks (in the event these sell through quickly and someone reading this still wants one), and we've got a couple other styles that production ran behind on, but they'll be available soon as well.