[Zope] Looking for variation of ExternalFile product

I'm looking for a product which allows me to manage files in zope which reside on the filesystem, and provide a natural way to be served from apache. As far as I see, none of LocalFS, ExternalFile, ExtFile provide a way to do that naturally - for instance by providing the 'precondition' property (to raise an appropriate redirect) or to allow an definable <a href="<something"> string to be rendered when called, analogous to the Image object. Is there something like that out there? thanks, oliver