try google site search instead of image search, you can usually find some gret sites, i think the keyword for dBZ is setti, so try searching for Dragonball setti, and try looking for just naruto fan sites for your images, sometimes you get lucky and hit the jackpot
If your talking about pictures liek david skiwan draws tho, your are highly mistaken if you think most companies put those images up on the web, you can try looking, but the character sheets are usually keps confidentail and only released to projects using the title (like budokai for instance). You can't expect there to jsut be the most prefect pictures ever created by man to make your modeling go nice and smooth, as an artist doing mods and models for fun, you are going to be stuck doing a lot of work with subpar, non matching refs that you will have to make due with and use your abilites as an artist to guesstimate what things should look like and how they should go. There, that's it, that is the last of my rants.......for tonight!