Thanks for the infos.
I have searched a lot on internet but for now I have found no additional source.
I have found xml gamelists and executables, but no source files.
My website now has all informations of all machine/software ever added on Mame and Mess since 0.1 release, including all "u" releases, so the first goal is reached.
I have added also all source code for drivers, more the a million of files stored and available.
If anyone has source code of missing files, please let me me know