Affiliate System for Pro Sites

Hi,

Has anyone used an Affiliate system that will do ALL of the following:

1. Track Sales from the Pro Sites/Support plugin

2. Base commissions on a percentage of the sale price (ie: 10% commission for different Pro Site Level sales, whatever the cost of a given level may be).

I know there is a WPMUDev affiliate plugin, but I believe it does not work based on the percentage of the plan Level price (if it is possible please let me know).

Thank you