From this thread on the SOE forum:
People have reported being unable to get two bracers of this type of armor because they are lore, even though they don't say so. You must give back the first bracer you get to Thach Jerden who will then give you a different type of bracer. At that point you will be able to get a second bracer.
Breastplate emblems are currently broken on the armor and will be fixed soon(tm).