Anyone with Goumi or Autumn Olive in Western PA? Need soil

I've been having trouble finding the right inoculant for Goumi berry online. Seems I need the "Frankia" type of bacteria but no one sells it.

Is there anyone in Western PA who has some vigorous Goumi or Seaberry or Autumn Olive growing near them? I'd love to swing by and take a tiny bit of soil to use as inoculant

I don’t know if anyone has done a controlled study, but I don’t think it’s at all necessary. I’ve got autumn olives grown from cuttings, and they are growing great. As always, I’m interested in opposing views and different experiences.

They do bloom too early and always get frosted. I need to plant some where they have some shade and don’t bloom so early. My goumis bloomed later, so I should get a few.