Customized Wedding Invite Script

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I need a plugin built for Wordpress or coding for a static website that mimics this:

Ideally i would like them to be able to see their changes as it goes but thats not crucial.
The crucial part is, instead of downloading directly from the site, I need them to create it, and add it to a cart and pay for it before they can download it. If it shows a preview it needs to have a watermark across from it. I will need help integrating this into whatever shopping cart program I use.
The final output would preferably be a pdf.

Additional Project Description:
10/02/2013 at 2:19 EST
Please include a portfolio of your work with your bid.

10/02/2013 at 9:31 EST
Edit: I selected the prerange of 30-250, I was looking more to keep this under 100 and it will not let me edit my budget.

Skills required:
eCommerce, HTML, Javascript, PHP, Shopping Carts
About the employer:
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