Prestashop Customization

We have an online shopping portal [login to view URL] We are yet to go live and are looking for improvements in the look and feel of our website. The website is based on PrestaShop 1.4 and we are only looking for changes in the look and feel. There is no requirement for changes in functionality. ## Deliverables Before I choose the final bidder. The following things are a must: a) Bidder to send me the websites that he has developed using the well known carts (tomatocart, ezeecart, oscommerce etc.). Bidders who have already worked on PrestaShop will be preferred. b) Bidder should have excellent command over web technologies. c) I would prefer free lancers to companies who post without even looking at requirements. d) Although I have an idea as to how the final look and feel should be the bidder should bid only with rough Mockups. Bids without Mockups will not be considered.