[Pro Sites] Combine multiple levels

Dear wpmudev Team,
I want to ask if it is possible to sell multible levels for one site. Our goal is to sell plugins individually so that they can be combined as needed. With only one level per site, it is unfortunately not possible for the customer to put together only the plugins he needs.

I hope I could express my wish in an understandable way. Unfortunately, my english is not that good.

Best Regards,