I believe the Hollywood Directory puts out various titles that
might help you.  They have one for writers, directors, producers,
and even for individual company listings.  They are expensive but
are updated quarterly.  Generally director's addresses are not
listed but their agents contact address is.  They are sold in
bookstores that have extensive film/tv reference holdings.  Samuel
French in Los Angeles has them.
 
Cristina Venegas
 
On Sun, 28 Sep 1997, Michael Haas wrote:
 
> Does anyone know a source that can provide mailing addresses for film
> directors?  I have some awards for the Political Film Society to mail to
> various film directors, from John G. Avildsen to Irwin Winkler, but few film
> directors place mailing addresses on the Internet.
> MICHAEL HAAS
>
> ----
> Screen-L is sponsored by the Telecommunication & Film Dept., the
> University of Alabama.
>
 
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Online resources for film/TV studies may be found at ScreenSite 
http://www.sa.ua.edu/screensite