Steve no longer sells seeds to the public, he’s doing development for large farms now, and has abandoned/passed on all of his SoL work to the best of my knowledge. On his personal website he says in the header “Spice of Life Seeds 1994-2003” so I think you can count on anything after 2003 packs not being breeder originals, exactly. Someone going by Kootenay on ICMag and other forums took over SoL at that point and I’m not sure yet how recommended those seeds are. He was running a forum and company named Deluxe Seeds at the time.
Fleur Du Mal/ @Baudelaire were given permission to be the preservationist of the Sweet Tooth line and he’s continued working Sweet Tooth #4 toward an eventual ST #5 release in the future.
He’s also just released a Ortega preservation, which Steve worked with to make his last release, Legends Ultimate Indica/LUI:
And LUI is kept in preservation as an F6 IBL by @KropDuster , I don’t see the seeds up on his site at the moment but he might be in the middle of doing a repopulation:
@SHSC-1 is starting a big Shishkaberry project soon, that’s his forever strain and he’s been growing it for decades, I’d look to his posts to find out who’s got the good Shishkaberry nowadays.