I was wondering if there was a mod out there that can achieve the following (I've looked but to no avail):

Let's say I'm selling shirts and there are three sizes -- S, M, and L

I would like the product page to be

Small <QTY BOX>
Medium <QTY BOX>
Large <QTY BOX>
ADD TO CART

Then, when the user clicked 'add to cart', three separate line items would be added to the shopping cart.

Anyone have any ideas?