Bravo 1.6D cost around £300 with a new waterpump and full kit. Half a days work. That was now a few years back so think £400 nad hopefully you will get change. Fiat quoted £750!!!
You are at the beginning of the window to change at that miles. Its worse on the belt if the car is infrequently driven but you should be able to take time finding someone sensible to do this..