I don't know if it's never made its way onto the page, or if I'm simply the first to see it - hell, it might even be a glitch, I don't know - but I've just stumbled across a Dragonbone Heavy Chainmail chestpiece in the Silverite Mine in Awakening which appears to have none of the details of regular Heavy Chainmail - no pauldron, no waist shields, no straps, no ornamentation, nothing. It's just the chest plate, the shoulder wrap, and the skirt. I picked it up off the Hurlock Alpha in the room where you fire a ballista at a statue to take out a group of darkspawn.
Here's a picture as proof:
Taken with cell phone camera