Wordpress ecomm/membership plugin with membership-level discounts

Hi there,

I'm desperately searching for a plugin or compatible plugins which would allow me to have a store on a clients wordpress site, with paid membership levels. The main feature I NEED is store wide membership-level discounts. Plugins which would also allow me to implement an affiliate program for referring memberships would be great.

I'm having a terrible time finding this. Many wordpress carts offer membership features, and there are tons of great membership plugins and stores separately, but none offer membership-level discounts (which seems crazy to me, because this is a popular feature). The only possible solution I've found is entering duplicates of all products for EACH membership-level and restricting access to each product and link based on membership. That's an insane amount of product management and administration for a feature that you would think should come standard in a shop/membership plugin.

Thanks so much for your help!