Affiliate Tools Needed

I have products on my site. I have banners made up for those products so I can advertise them. Now I want to grow my products by putting those banners on other sites. What I need is the ability to generate referral ids, have the customer pay with paypal, and I get notified that they bought and who referred them. The people who handle the banners will get a referral id from me so they do not need to generate one themselves. I don't need anything fancy to keep track of referrals, products, etc... I also don't need anything to pay them as I will do that myself. Summary: -Need to be able to generate unlimited referral ids -Need the customer to be able to buy the product with paypal -Need to handle multiple products -Needs to notify me that the purchase happened, the product, the customer, and who referred Will need to see the final product shown on a demo site that you create.