These sites are unlikely to be down, so if one of these won't load, disconnect and log on again. This costs another phone call. Same tree, different branch. Sometimes the page has moved to another folder on the same host. Many sites now require you to enter via the front door rather than jumping straight to the branch.
Many sites are temporarily offline for updates.
Sometimes old sites leave forwarding addresses. At other times you need to search for their new listing. Try your favorite search engines and directories. The Age Company Ltd 2001. Any unauthorised use, copying or mirroring is prohibited.