Fuel pump leak

[roadtrip]

I have 1992 Fiat Uno, 1.1 i.e. SX/1108cm, all original. I've noticed a srong smell of petrol inside the car, but not in the motor compartment. After a bit of searching I found the problem to be coming from under the back seat at the the top of the fuel pump. I wiped it dry and watched the top of the pump get wet again. Is this an easy fix, such as a seal replacement, or do I need to change the entire pump?:idea:

 

[custard]

best post in the uno section mate,one of the uno guys will know