This page, thanks to Zachary Brown, contains sprites sheets for every mobile suit, ship, mobile armor, and person that appears through out the course of the game. The images on this page are in .gif format to shorten load time. The original sprite sheets are in .bmp format which you can get over at the downloads section in a nice little .zip file.
One more thing, I realize that the Brackets sprite sheet is incredibly difficult to see so I have made it available here in its original form. A link will also be present to this in the Brackets table below.