Well you see alot of current GC NPCs with Con, the flags strapped to their backs. Perhaps something like this for free companies? Heck would be a neat thing for Seal turn ins too. Just need a Slot for it in the gear window.

The reason tabards worked is because you didnt need to sacrifice any actual gear for it. If you release Free company or LS Armor people won't use it (unless we get Vanity slots! hint hint)