Transparent-back stock art

Uhh... does anyone know where I can get transparent back stock art of the outfits like the one Flora is wearing on the site that is a decent size, decent clarity, and can layer over other pictures of the girls? I'm making a series of pictures for the Winx Wiki homepage with different oufits, like the snow, cowgirl, rain.. you get the idea. Any ideas? The one right now is Believix, with the pictures provided by the always wonderful Winx-Fairies site. Come check us out.
www.winx.wikia.com

I have a bunch on my Outfits page, and I got them just by searching on Photobucket. (Photobucket.com)

Kay, thanks so much. I'll keep looking. Thanks for the great Believix stock art, by the way. :)

Anytime! And thank the random Photobucket people who upload, namely superanimequeen20012003 and pnatpb (I know those names off by heart now )