The entire oil cooler went south or what specifically went bad ? Maybe just an o-ring or gasket ?
If you do have to replace the entire unit, try some other places besides the dealership (like our classified section or other various internet based Ford parts websites).
Burns, where have you been, miss you in the SN-95 tech, come back and school these fools.
Yea, what burns said, the oil filter adapter has a gasket which makes the filter look like its leaking at times, both coolant and or oil.