It ain't worth the risk of having Facebook sue Arsalan and the others of copyright infringement, so it's a fat chance for them to still support the old theme.

See :
https://www.opensource-socialnetwork.org/discussion/view/1378/warning-ossn-v41-and-the-facebook-style-theme-and-community-changes

https://www.opensource-socialnetwork.org/discussion/view/1531/ossn-v41-has-been-released-please-upgrade-your-website

Ossn, has stated why they created their own "theme" "GoBlue", if I remember right. It's because Facebook complained about the theme Ossn was using, so, Ossn to prevent conflict changed the theme to make it safer, hints why they no longer support this theme. You may although use the Facebook theme at your own risk from GitHub, I believe the name is.

i want facebook responsive theme for ossn 4.1 that work on web and android and uc browser like facebook do.. plz provide any way to convert facebook theme for different device in ossn 4.0...

where?