PHP Expert Coder

I have a website which is built on the Symfony PHP framework . I want to add a very simple affiliate system using so that affiliates can promote the service of my website. The users/customers buy the services and pay using PayPal.. SO i need an affiliate system in place where by affiliates sign up with their paypal id and if they bring sales they get paid monthly from the sale date (or whatever period we decide) thru PayPal.. Needs a simple admin back-end also ...You can either do this from scratch or suggest a ready script and implement the same. More details and website URL will be provided in PM.. Send me a link showing your recent related work .. preferably if you have worked using symfony framework.. PLease only send me 3 links.. Very Important Only Send me 3 links Mention the work .. Symfony when u send me a message or I ll ignore your bid Thanks.