You know where there are better references than the internet? Tattoo shops. You know who has a shit ton of flash/books? Tattoo shops. You know who is well acquainted with these collections? Tattooers.
Do some initial poking around, then find a tattooer or shop, then go say, "Hey, I saw this Jerry wolf, the full body one with his tongue hanging out," or whatever you want, and they'll say, "Oh yeah, lemme see, was it this one?" And more than likely, they'll pick out one of the SJ books they've undoubtedly got and flip to the page and you'll say, "Oh yeah, that's it, that line drawing is way better than the one I found online."