Magellan Blue Nav

Does anyone have a copy of the Blue Nav CD they would like to swap for a copy of Discover Aus? If this is not the case but you do have the Blue Nav CD, then would you consider seling a copy? I'm just getting into the GPS thing for the first time and bought a package with Discover Aus thinking this would have the Marine data on it. But it doesn't. Any help would be appreciated. Thanks James.