mines phueggerd!
cheapest place to get a replacement?
does oil cooler need changing aswell?
Easy job?
Oil cooler (well heat exchanger) comes built into the Rad.
Very easy... as long as the oil cooler pipes come undone :shock:, they have a habit of seizing, so when you undo them the pipe gets twisted.
To change the rad:
Remove the viscous Fan
Remove the water hose off the water pump - easier to do this end (the one that goes to the bottom of the rad) - point pipe downwards and catch the coolant in a bucket etc. (remember to remove header tank cap)
Then remove the top hose from the top of the rad.
Remove the fan cowl.
The disconnect the two oil cooler pipes - you will get some oil loss, so have a bucket underneath - tuck them out of the way.
Undo the radiator top mounts - and then you could be able to lift the whole radiator assembly out.
Refitting is just a reversal of the process 
...
But make sure you bleed the cooling circuit properly and check your oil level.
Cheapest place probaly:
http://www.mps4x4store.co.uk Although
http://www.mm-4x4.com are they same price - your after part number: NTC6168
Ian
