How do I access my iWeb website when I no longer have the original iWeb program it was published with?

Last Fall, my '06 iMac was vandalized and destroyed unexpectedlyl. Since then, I have'nt been able to access my only website, which was published through iWeb. My new iMac does not have iWeb.

How can I access my main website published through the old iWeb? I must transfer my domain name/site to a new web host and build a new site. My website is out of date and must be updated/replaced asap. Please help.