I'm not based in the US, but I can send you any of these through EMS:

Heirloom Opuntia Cactus Seeds (super tasty Pirkly Cactus Pear)
Heirloom Deglet Noor Dates Seeds
Heirloom Fegoos Dates Seeds
Fresh Heirloom Huge Red Pomegranate Seeds

All of the above are non-GMO, and purely grown in our gardens for years, the dates for instance had been fruiting for over 50 years now.

I'm based in North Africa, so anything that is found here, I can exchange it with you, and I'm also looking for any of these if you have them:

Papaya
Pawpaw
Jack Fruit
Lychee
Star Fruit
Guava