Since everyone that makes stylesheets does it on their own time, you may have to wait until someone wants to do it.
You may want to do some studying on how to do it yourself
Admin > Manage Styles
Click Create Style
Type a name for the new style in the box - scroll to the bottom and save
Click Modify Style
Choose the style you created - click Pick Style
Scroll to the bottom - erase all of the existing css in the box - paste the new code in.
Click Modify Style
To use your new style choose it in the dropdown menu from Manage Styles.
Stylesheet Making Tips/Helpful Links How to put a background image on your forum