Ok, here is how to get your hands on some glass armor (my armor rating right now is 130 with this stuff, its great!)
go to the Tower Of Drusk in Ghostgate. go downstairs to the smith, close the door and kill him, take the armor. run back to BALMORA and join the THEVES GUILD, talk to the guy at the bar downstairs at the bar and remove the price on your head. the armor is yours for the keeping. to make it stronger, go out into the wild and let creatures hit you, use the health code to regain health (get this at xbox.ign.com) and it raises your light armor rating...its great