Talk to Wrex enough and ask him about his family. He will tell you about the armor and give you the coordinates to the base where he believes it is located. It is located in the Phoenix system of Argos Rho. You can go to the planet without talking to him first, although I'm not sure if you find the armor if you don't bring him with you.
You do find it if you go without him if you have heard about it from him if not just take him with yo and he informs you of the story of the armor wen you get to the building. Xxxjeffxxx 02:07, February 7, 2010 (UTC)