You've got nine diaries, go ahead and contact a few of the breeders and see if they are willing to send you seeds to make some GD diaries. Stick to contacting 'official representatives' or directly through their own websites.
I'm sure most have a godfather og or some variant of it... which is as close as you'll get unless someone used 2 "original" godfather og cuts to make the seeds. More often they buy a well known 'genetic' and then breed it with their own plants. There's no oversight or regulation of this stuff. Who knows how they made the seeds? expect godfather og to be different from each breeder, really. There may be some similarities - not impossible.
for any particular strain, you'd have to google to find out who created it and where to get original genetics from.. but even they may have had to breed it with other stuff over time, if decades old.