Get paid by Referral (need to find the right plugin)

Greetings!

Currently, I am promoting products for Amazon and other online retailers and getting paid for commission (using MarketPress plugin). Now, I need to find the right "referral" plugin where I can refer to my consumers to professional services (Just like ServiceMagic.com where they refer their customers to professional services and get paid for referral).

I wonder will your Directory plugin or Pro Site plugin work with this concept?

Please advise and thanks!!

Brad