While I'm fairly sure I have a backup of those, I wouldn't begin to know where to look for it
Honestly though, most of them were just grabbed from the web. It shouldn't be too hard to get those again. It looks like everything is still in place for them, including names and post counts, the sprites just need to be added to each theme's directory. (I seem to remember I had an extension installed that would read them all from one place rather than duplicating them, hence that ranks directory.)
Looks like archive.org is missing 777.gif,
pretty sure that's the only custom one that's gone.
