Custom Clothing Website

I am looking for a user interface/ shopping cart system for users to purchase made to order clothing. The user should be able to scroll through several "templates" and then select the fabric pattern they want. (I envision something like [login to view URL]) but we do not support text, images, etc... For the payment system we want to use Google Checkout linked with Google Analytics. That should take care of not needing user accounts or an SSL, but I would like to take advantage of the newsletter system. Prices will vary depending on the fabric pattern and the template (style) the user chooses. I want the system to also support an inventory as well. I am looking to have the entire website built with up to 10 additional pages for additional information.