Hi Mikey,
I am growing too some cherimoya seed from Spain and Portugal, I think they are looking good but they old only under 1 years old. I am growing too some Taiwan cherimoya that I bought from supermarket, they seedling grow very well. And now I am ready to sowing some Taiwan Atemoya seed that I bought from supermarket.
In my country some nurseries sale fruiting tree of Atemoya like Pineaple Atemoya, African Pride Atemoya, Pink Mammoth and Atemoya from Australia. But not commercial yet except for Australian Atemoya.
Regards,
Alfian