I know a couple sites.

http://www.animewallpapers.com/wallpapers/ffx2/

A lot are pretty crappy but some are cool like the ones by Paul Rivera. I had one of his for a while.

http://rpgfantasy.free.fr/galry/jeux/ffx-2/wallp.php3

There aren't very many here but look interesting.


I like some of the wallpapers on ffx2.net, hey my current is from ffx2.net. Well, if you still don't find one you like, I recommend going to google and searching for ffx-2 wallpapers. You'll have to sift through a lot of junk but if you get a good wallpaper, it's worth it.