PHP simple billing script

A cute little and easy project for a inventive PHP coder : I need for my own use a very simple billing script. I want to store my customer's infos, my products (hosting, domains and website building) and keep track of invoices made to customers as well as paid/non-paid invoices. I have to be able to add customers and products whenever I want or need to... for sure... Some products (websites) will be sold just once, and some other products may be sold monthly or yearly, so we have to keep track of renewal date (for domains and hosting). I would like the invoice to be seen in screen or to be printed out in PDF format. I also would like to be able to choose between "invoice" or "quotation" with a radio button. Only one user, no payment gateway, not to be published on the web or reselled... I would appreciate a cute looking thing. Maybe having a look at [login to view URL] may help... Nice, but way too much features for me... Hope to hear from serious bidders who read everything before bidding !