Customisation of a Wordpress theme and e-commerce plugin

I need someone to do some customization to a Wordpress theme and/or a plugin. I have purchased the Suppastore theme ([login to view URL]) which I really like in terms of design and functionality, but I would like it to have more powerful e-commerce options, something along the lines of wp-ecommerce or cart66. I have also purchased the cart66 plugin and the Gold Cart add-on for wp-ecommerce plugin. I would like either one of these to be modified to work seamlessly with the Suppastore theme, so that the front-end remains the same in terms of products, variations, cart, etc. but with the extra reporting and far better options of the other plugins. To make things clear, the Suppastore has e-commerce functionality built-in, and it looks and works beautifully in the front-end, but it is quite limited in the back-end. I can supply the theme and the plugins to whoever can take this on.