Just a quick note, I'm not sure if anyone else has noticed, but I started a game earlier in the week, and even after many MANY hours of play, and a good 1/5 of the map revealed (those Insane maps are.., well, insane!), I have not found a single Elerium source. Not sure if this is a known thing or what, but I'm going to start a new game and see what happens there...