I'm not going to bother to look for more. It's relatively easy. Just type "Rinoa" in the image search on Google.com. Also, you said you wanted to find a "full-size" picture? Unless you want a 5'4" or so tall image, check that the pixels are at least 800x600 or something.
If you're wanting references for rinoa's outfit, it's not any more complex than those. It's rather simple, and I can draw it from memory easier than just about any other FF character's xD
Oh, and then there's the itadaki street special art. That's head to foot.
Oh, and what's fun is googlesearching their *japanese* names.
because we all know japanese fanartists are better, right?
The easiest one tos tart with is Squall, because that's an english word already ^_^
Then, if you use common sense with the sites that have fanart of him, you can more or less guess which combination of characters are whose names, because they look the same. (if you don't don't have an IME set up to view japanese characters, well, it won't helpxD)
I'd like to take this time to note that I do *NOT* speak japanese in any way xD I might be able to parrot the words enough to sing to it, but as far as using it to convey ideas, I'm out
This is just something I had the idea to do one day and it worked about as well as I could've hoped it would xD
(besides, we all know that japanese fanartists are better, right)
You may be able to just copy the boxes/characters/question marks. But I can't promise that. (although I think I remember copying boxes before I installed the ime and having success with thatxD If they display as random characters, you're probably screwed)