For a full collection of Dolcett try h##p://necrobabes.darkfetishnet.com/dolcett. As for Beavers Angel Corps do a search on E-Hentai Galleries.
Are they hosted anywhere else? The resolution of a lot of these is fairly small and makes it a little hard to read the text.
These are supposed to be from Karen's old site so they're probably the best available. Is there a story in particular you're looking for?