Custom bandwidth exceeded page
Login to your server via SSH
Backup the original file.
cp /usr/local/cpanel/apache/mod_bwlimited.c /usr/local/cpanel/apache/mod_bwlimited.c.bak
Next we edit the page and make it how we want it
Scroll down until you see the section where there is HTML code for the bandwidth page.
It will look like this.
<HTML><HEAD>n<TITLE>509 Bandwidth Limit Exceeded</TITLE>
Modify it to whatever you would like.
Be careful and don't go overboard with the editing and customizing.
This is a good place to put contact information and how to order more bandwidth.
Save the file