This area is mainly for complete cars that people are wrecking.
Could I suggest that you start another thread in the main part of this area 'Spare Parts and Other Accessory Items' advertising the rear axle from the Fairmont if that's all that's left.
https://www.fordforums.com.au/forumdisplay.php?f=42
Then asking for the other parts you need in the 'Wanted Car bits and other general items' area.
https://www.fordforums.com.au/forumdisplay.php?f=43