those are both super rare and hard to find , your best bet for A. Salzmanni probably being Scion. I think Mike T had seeds to share of Russels Sweet awhile back but those seedlings would be young still and he holds the key to that Gardenia. as you probably read on that thread. "As there are so few fruiting trees it would be good to have them secured in a few different places.There won't be enough seeds for everyone who wants them."
Thankfully Mike T. is a fruit warrior and is helping spread this around for as many as possible to enjoy.
Ive got quite a bit of Dream scion available come March, I'd be happy to trade then.
I always have a hard time finding Green Sapote seeds and the Florida Nursery Tree's i see are grafted on Mamey which is a deal breaker for my location.