Create a responsive Prestashop 1.5 theme

We need a rework of the design for [login to view URL] as we are going to use Prestashop 1.5 instead of the webshop we uses now. It needs to be complete and should be responsive to work on all devices. The most important thing is not to make it look diffrent than it does today, but we need a theme that works for Prestashop 1.5. Before we implement and decide we need to see design suggestions that we can approve and then you can code it for us.