There is no need to change the rear axle when converting the rear drum brakes to disc brakes. The axle and wheelhubs of drum and disc brakes are completely the same. After removing the drum brakes the disc brake parts can be bolted on the axle.
To do the disc brake conversion you will need the following parts:
1x Left brake caliper complete.
1x Right brake caliper complete.
1x Brake pad kit.
2x Brake disc. For the 1.6 Duratec you will need 260 mm discs.
2x Brake caliper bracket.
2x Brake lines (hoses) for disc brakes.
1x Parking brake cable kit.
2x Guiding pin kit. This kits contains guiding pins and rubbers.
2x protection plate.