I have GameGuard rev 1295 source files (*.npz and update.cfg) for
GCTW if you need.
When GCTW still used Gameguard 2 years ago, we emulated GG server to let it download old files. So Cheat Engine would not be detected, no matter what GG update.
Last mouth I used these files to test in NAGC, but it didn't work. Maybe these files are not suitable or some reason that I don't know.
So if someone have old rev source files for NAGC, I may try again.