The other option for fenders are the Gilles Berthoud fenders that Peter White sells. They make a 700x40, which, in person, looks perfect with a 28 or so. They also have a very nice flush mount for the fender stays. Don't be alarmed by the fact that they are stainless steel, they are still pretty damn light.
Thanks, exactly the answer i was looking for. and i wouldn't be surprised about the stainless being pretty light.
Would mafac racers fit around a 40mm fender?