[users@httpd] Mod rewrite F flag

[Erez Segal]

In my server, I want to reject access to files that exist. (to some php
files that are allways included via other files, and never needs to be
accessed directly).
I use:
RewriteRule ^(.*)$ - [F]
The trouble is it sends 403 - forbidden.
I want it to send 404 - file not found.
how can this be done?

Thanks in advance.
 Erez.