That is amazing! That being said, I've been working on implementing SREP with NSIS and sadly had to rewrite quite a lot of Code (maybe I should try InnoSetup again, seeing how SREP and FreeArc are directly supported there). That by itself is no Problem, considering how much easier the download would become, however, there seems to have been an issue arising.
The Freearc Homepage, including the source-code appears to be gone entirely. Visiting http://freearc.org only leads to a parked advertisment by some Domain owner and the Code doesn't seem to have been cloned to Github.
Since you seem to be quite knowledgable with the Project and compression in General (thanks again for helping us) I was wondering whether you had any what had been going on there. Looking at a WayBack copy of the site, the last update happend in 2010, so I'm guessing someone didn't renew the license for the URL, though that is only speculation.
On the creators Github, neither SREP nor FreeArc seem to be present, only a sketch for Freearc Next: https://github.com/Bulat-Ziganshin/FA/wiki
I've already contacted the developer since I would really enjoy using your idea as it has the potential to make using Whonix that much easier.
Thank you very much and have a nice day,
Edit: Just now noticed, the site says that the Domain expired on the bottom.