Landrover recommend tin for the A engines, and composite for the B engines. They also say not to change types. Have just done mine, with the correct tin type.
As for the bolts, they're not the stretch type, so you can reuse them.
pete
power steering pump pulley is erc675
4 groove long alternator belt is err2678
water pump belt is err2073, but that's without ac fitted.
i've the same set up and did mine last week.
hope that helps