Redirect to secure site

I have an apache server running normally on port 80 and securely on port 443 as standard.  I only want connections to the secure site but i dont want to just comment out the Listen 80 line in the apache config document rather I would like it if someone connects to port 80, only 1 document can be viewed and all other pages will be shown as 404.  On this document would be a short ammount of text saying, this server is only available over a secure connection, please click the link below to connect securly, clicking the link would r-direct the user to https:// rather that http://

Anyone know how this is possible ??

Thanks !