Ford Transit 2.5 TD 1998 Diesel pump leak?

Hi there, i was wondering if anyone can suggest what i need to do..My 1998 TD transit has developed a diesel leak from around the pump area even though i cant see where it is coming from. its not the pipes its coming from under the casing. this is an electronic controlled pump with a electrical plug that goes into the back of it. 1, will i need a new pump or 2, can i get it repaired, if so how much do you think it would cost. I had a non turbo transit b4 that did the same but the man replaced what ever it was insitu as it was coming from the top.... Help and advice much needed