QR-Code generator in a magento e-shop

Hello We curently operate an e-shop based on magento platform. We sell T-shirts with QR codes on them. We want to offer the user the ability to generate a QR code in our website and then have a preview of it on the product. We want the QR Code generator to be on a modal box (see attached zipped folder containing screenshots). Please note that this application must be integrate with magento perfectly. The generator code must be stored in a database in .eps format if possible. The user will also have to choose among different options (like generating the code from a raw text, a url, contact details etc). Also, the administrator (us must be able to set some parameters at the backend, like the color of the qr code, or/and the background color) These parameters will vary for each product. We are open to suggestions about what API you want to use. But please have in mind that we need a solid application that will not conflict with our existing magento installation. We would like you to bid only if you have a previous experience with QR Codes and/or magento. PS: All designs will be delivered to you in .psd format. Payment will happen only when/if the delivered product functions correctly, but we can arrange a payment in the middle of the project if we are happy with the progress. If we like your work we can talk about a long term working relation also. We have good ideas on how to implement the QR Codes on several application over the internet. Best regards. John.