Graphic changing

[hipjipp]

Hi, does anyone know how i change the character pane with following tabs and pages textures so they look square without the help from skinner. I'm just looking for reskinned textures and i hope i can get some help over here.
And if anyone wants, they can do the skins for everyone else who wants this. I hope there is since i don't got a needed program or the skill to do it myself.

Please help.