Apparently the black liner in the headband is rare and hard to find. Most 4AAAs have them ripped out. I was lucky enough to get a series 1 unit with the band, though it was snapped on one side and required a simple repair job using some electrical tape.
I've considered buying a 4AAAT for the shell and headband inserts but I don't think it's worth it, since it sounds like absolute garbage and the normal 4AAA's frame is MUCH nicer...





















