I belong to a hobby club. A member who had been our webmaster recently resigned and disabled our old web site in the process. He's also kept control of our old domain names and won't push them to us. We've had to get a new domain name and build a new web site. However, the old site still outranks us in Google. People who follow the old URLs get nowhere, of course, because the old site no longer exists. What can I do to get the new site to outrank the old one in Google searches?