no dude u can get one for free, u just have to patch the uxtheme.dll file so u can use unsigned themes and then u can download a theme from here.....
instructions on how to patch uxthem.dll manually- http://www.belchfire.net/index.php?showtopic=9001
xp themes - http://www.belchfire.net/xp-themes.html
There is also these Brickopacks from crystalxp.net. I run VistaInspirat myself and love it.
http://www.crystalxp.net/bricopack/