Specify different Paypal emails for Different Subcriptions

I am looking to specify a different email for different subscriptions. This way I could have users pay directly to other providers who are selling subscriptions through my site.

I did not see anywhere to specify a different email besides the one listed in the Paypal Gateway settings.

A great way to do this would be the ability to add Paypal gateways and then under the subscription settings specify which gateway to use.

Maybe I could do this using meta data and entering that in the gateway settings?