Just about any road triple derailleur will handle a 52-42-28 setup. One thing to watch for is that some are designed with a minimum tooth difference between middle and big ring, often 11t and sometimes 13t so make sure that isn't the case with anything newer (current 105 is 11t and current ultegra is 13t, for example; I don't think Campy lists the min. difference in the spec for their current triple FD). I think older triple derailleurs are more basic and universal (my 5503 FD from 2002 handles a 52-42-30 like a champ). Doubles FD's will work, in fact they may even shift better (Shimano triple FD won't work without ramps/pins for example while a Shimano double will work).