My nursery sells seed nuts. We collect from select mother trees of chestnut, hazel, black walnut, butternut, heart nut, hybrid oaks, and lots of other species.
We usually send seeds out in the fall, most things are sprouting by now. Here's our page
Twisted Tree Farm and Nursery
This is my favorite show. And this is my favorite tiny ad:
It's like binging on 7 seasons of your favorite netflix permaculture show