gearbox + rusty pipes in the way

right then guys i have mgzr 25 20 diesel i need to change my gearbox im looking for some advice i have removed battery tray n air box after removing these i noticed the water pipes that are mounted by the bellhousing bolts are rusted really badly the one end of the pipes go near the turbo is there a easy way of getting to these ie by removing the radiator ? how do i remove the radiator ? the easy way ? do i need to remove the front bumper to gain access as i would like remove these pipes without breaking them ?

can you buy these pipes new one is roughly twin 10mm pipe the other is roughly 16mm any idea of the price of these pipes please

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