Oil cooler hoses on a Coop are a real pain to get off in as much as they practically weld themselves to the cooler. It all depends on the state of the cooler as it's very easy do damage the threads. You may be lucky, but I suspect you'll land up requiring a new cooler as well. These items are very expensive. Alternative Autos will probably be able to help you out. Flea Bay have them from time to time.
If your lucky enough to free the hoses, take them to one of those places that make up high pressure hoses, they will make you a set for a fraction of the Fiat price.....Best of luck.