Safari 5 extension for site-specific CSS customisation?

Is there a Safari 5 extension along the lines of Stylish? Basically a way to quickly install or create site-specific CSS files.

Solution 1:

Feel free to install my Stylish extension for Safari (also available in Apple Extensions gallery, Developer section) or fork my project on GitHub.

Extension in development, but you can create new styles, search/manage/edit styles from user styles.org database, styles options - only default values supported in current version.

Solution 2:

http://code.grid.in.th/

Thanks to http://safariextensions.tumblr.com/post/687054388/post-user-css-06-11-10

Solution 3:

It appears as though an independent developer has ported or rewritten Stylish as a Safari extension! It is currently in beta according to the developer.