If your not in a hurry, there’s a GG4 RIL (recombinant inbred line) being sold by our tonygreen. there’s a group buy going on, he’s producing a batch of seeds just for the OG group buy, $50 for 30 reg seeds. but the plants are only just about to be put into bloom so no seeds for at about another 3 months. But form everything I’ve seen, other than getting a cut, it’s as close and reliable as you can get to GG4 in seed form. A lot of variation in S1 of them from review I’ve see, and prone to hermi.
Also, there’s a seed run for NL#5 going on, just started the pollination I believe.
Otherwise, I wish you luck on your quest, there are some choice strains on your list.