air con motor clunk...

Hey all been a while since i have been here but back with yet another question for you...Anyone who has seen my past post will realise that myself my partner and our son are traveling around the block for 9months ...We are currently near port lincoln in sa having left sydney on dec 1st... And about to get ready to cross the nullabor and guess what happens good old murphy makes an appearance....Hows about crossing the nullabor in feb with no aircon... We are driving an ef futura s/wagon and the aircon motor has packed it in today no sign of refrigerant loss but when i started the car this arvo there was a loud clunking noise coming from the aircon compressor only apparent of course when the aircon was on and the aircon compressor clutch engaged????WTF? after the initial panic and realizing it was the air con motor and not anything else i arrived home(our campsite near coffin bay) to have a closer inspection the aircon motor was not engaging at all by this stage.a safety mechanism i think but the bearing has spewed oil out everywhere...Anyway murphy wins this round anyone have any ideas on how much its going to cost to fix?,whether a reco aircon motor is necessary...after replacement is re-gasing required anything at all really cos i am in the dark on this 1 and would like to have air con b4 i cross the bor...cheers Boe