Yes, I've wondered the same thing.
It would require the Admin to locate and extract all attachments from Bill's account. I've forgeton the exact procedure for vBulletin
Bill didn't post many images in recent years, so there are very few at the Xara-Users forum and those he did post there are also posted here.
When I originally created Norman's Gallery, Risto Klint was Admin who helped tremendously with the task of getting the URL of each image Norman had posted. There's (used to be) a setting in vBulletin which generates a list, but this requires admin access. More recent vBulletin versions may differ I suppose, I haven't kept up with this software.
Either way, ask Barbara Bouton otherwise Dan McNulty (Xara sys admin) can probably help.