The standalone version is free but will be unmaintained as long as the framework version becomes available to the public as a paid plugin. Since then you may modify and maintain this standalone version by yourself, but please no resposting without my written permission.
See FAQ if you have doubts regarding changes to the staff bar (moderation menus, etc.).
The original theme color palette was from NewvBB 2004 (a nulled brand release of vBulletin 3.0.x only) which built-in style was made by 007pig.
(Screenshot made from my computer after my manual migration of the theme to vBulletin 3.8 releases.)
One of the sitemasters of CSCN, "xgao", tweaked the theme with a new chrome color (2004):
(WebArchive doesn't cache vBulletin forum icons and logos.)
And, my reproduction of this theme for XenForo 2:
Demo site: BOTH darkensoft AND 谱务中国 (Engravers China)
(I am the current webmaster of this forum after it has been archived for 10 years. XenForo 2 is the first purchased forum software used in CSCN.)
Other demo screenshots from Engravers-China forum: