Different Magento header for wholesale store view

Hi My shop has a retail and wholesale view that use the same template. I'd like to be able to change the wholesale websites header completely and am unsure as to whether I need to duplicate the template I am using which wouldn't be ideal as it would mean that any changes in the future would need to be duplicated. I would like to get this implemented as soon as possible. If you look at the attached file you will see the url of the website in question. regards, Richard