Cart plugin that automatically creates a product when you create a post?

I am working on a website for a client. They are offering streaming videos, which are added to the site by adding new posts. My client wants to allow users to either purchase digital downloads or physical DVDs of the video they are currently watching.

What I want to know is, is there a shopping cart plugin that can automatically create a product whenever a post is made? For example, I create a new post with a video in it, and the cart plugin automatically creates two products: one for a digital download of this certain video and one for a physical DVD.

Thanks.