I am not sure whether some of the images of Risto or his circumstances would have had been lost forever with our loss of Imgur, or if some of the images might still be retrievable through archives, such as the picture of him splayed out in front of the pink Rolls Royce, or him lounging in a pile of silver or another image of his burnt castle.. that might have had been accompanied by a local news paper article too.
Oddly enough, imgur isn't so much the issue. Although they block image requests from the bitcointalk image proxy, the images are still reachable. Here is an early Risto pic sourced from imgur.

Unfortunately, it seems for most of his pictures, he didn't use imgur and his pictures have disappeared into dead sites and what seems to be a terminated google account. I think I have the silver picture on a hard-drive somewhere but I am not sure where it might be.