User Upgrade for Multiple PayPal Accounts?

I'm trying to find a user upgrade that will allow for multiple PayPal accounts so that when people register for a certain type of upgrade, it goes to the proper PayPal account. There used to be one that did this but from what I can tell, it's no longer available. It was called User Upgrades by Waindigo.

Thank you! :D
Or, would a shopping cart of sorts allow someone to purchase a user upgrade? I have a forum with multiple users who are teaching classes that I want them to get paid through their own PayPal accounts when someone "upgrades" to their class. Is there such a thing and if so, what do I look for?