My website runs a premium version of OSSN which you can get from here [login to view URL] there is a free version you could get on [login to view URL] the version is from 2016 and not the latest one. My version is on 4.3.1. There is a Facebook theme that was official for OSSN but discontinued and won't really work on the latest version and not mobile friendly like the other software. Which can be found on [login to view URL] The only boundaries is that by contact I am not allowed to share the CMS script and trying to look for the cheapest and most affordable price.
I will give my website name , logo and colour to the one who will decide to help
Also in the future i would like to see if people could make a custom component for OSSN and new features for the site, many thanks. Will be very grateful to the one who does it