Website(s) manager

We have several websites. we are looking for an seo expert/web page builder to compile pages for us with unique content to improve our natural search listings for all the major local towns and cities in the UK, for our unique search terms eg buy silver warwick, sell silver Accrington etc We use Joomla 1.5
A good example of what CONTENT we want can be found at http://www.royalgoldbuyers.co.uk/gloucester.html search term.. "sell silver"

We want to target 100 towns on each site, ie 200 in total. each page will have to have slightly different content, . we also need this job finishing in a week