The same set files seem to be mirrored at https://katastrophos.net/symbian/mirrors/delight/. Probably more wget-friendly than Mediafire.
Here is a list of active Symbian software developers* (+ links to its projects).[2]
P.S. I'm luckily archived/mirrored LCG's X-plore[3] & ProfiMail[4] apps source repos in time when it was released into Public Domain by LonelyCatGames* team (now official repos is disabled).
[0] https://mrrosset.github.io/Symbian-Archive/index.html
[1] https://github.com/mrRosset/Symbian-Archive
[2] https://github.com/mrRosset/Symbian-Archive/issues/10