I think you will find there is a classic BOAC livery available in the expansion pack for a freighter and there is another classic BOAC repaint available for the standard 300 ADV model around on the net, not sure if it is listed in the free liveries section. Both liveries are for the period about 1973-4 period, blue black with the gold speedbird. These are the only ones I know off that are available none in the white tail blue stripe style, unless there is a 2004 model available which could be converted for the FSX.