PHP Developer Required to Generate PDF Invoices

I am looking for a competent PHP developer to generate a PDF Invoice using the design and layout I will give and using the variables I will define. The pdf output should be sent to the browser as an output stream - i.e. no temporary files generated on the server. I also need an option for it to be emailed to a customer, using an array containing email, subject, messagebody. The PHP code should be written and commented well. It should be stand alone to easily use alongside our current PHP files. MAX bid is $40, Please do not forget to mention time duration.