Many and varied hoods can be found at LooseScrews.com (formerly the Third Hand):
<http://www.loosescrews.com/index.cgi?nr=1&b=&c=&sc=&tc=&q=hood&s=& id=56706843484>
They have Modolo aeros, plus some nice black and natural generics for $17.95).
<http://www.loosescrews.com/index.cgi?d=single&c=Brake&sc=Lever%20Hoods& tc=Campagnolo&item_id=EA-BHNRG&id=56706843484>
Don't know if anyone has mentioned these folks as a source already, if so I apologize.
Bob Hovey
Columbus, GA