You can usually find them in the Blue Book or the Hollywood Creative Directory
 
Irwin Winkler is at
 
Winkler Films
211 S. Beverly Dr. Suite 200
Beverly Hills, CA  90212
 
I don't know Avildsen. Sorry.
 
 
 
At 08:46 PM 9/28/97 -0400, you 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
>
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>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