E-Commerce Billing System

I really need a scheduled billing system that lets me bill my (B2B) customers in arrears.

Example:
I ship product.
Customer recieves’s and sells product.
Customer wants more.
I bill them for the first order, before they can order more.

Basically I only want to charge my customer’s if they want more of the product.

Is there a way to set this up in a WordPress environment?