Approach a local art school and run a contest offer to financially reward the best design ideas submitted by its art students. Take all suggestions during this limited contest for unique appearance, sleek design, new product exterior finish, color change or combination, texture or material suggestions or some other new idea. Award students cash prizes, gift cards, internships or maybe donations towards their tuition bill. The program will yield great publicity and also may yield some unique ideas not thought by your product design department.