Create Your Own Sticker/Graphics Website Needed

We need a site very similar to the functionality of http://www.boardpusher.com. Customers should be able to create their own designs online with live preview. Customer can choose to design new skateboard, sticker, decal, bumper sticker, tshirt, mug, button or mousepad. Should integrate a simple shopping cart for paypal. This should be extremely easy to use and easily integrated into an existing site. Customer whould have an online image library, ability to upload pictures and edit text color, fonts, size etc. Please provide samples of similar work only. Thanks, Jim