231887 Simple php invoice script

Hello. I want a clone of the script used on [login to view URL] I am interested in the simple invoice script used. Please go there and click on buy and submit an invoice and get a reply. Check what comes to your email. I need the users to be able to download the invoice in text format and possibly in PDF format. .There will be a simple admin panel for viewing and configuration by the admin. Its a simple script. I saw some free scripts but they have more features than I need. I need something quick and simple. Please test the script on [login to view URL] before you you post.