Good question, Brent. I'm pretty sure Rainbow Blossom sells soybeans in bulk, but I doubt they're local. That would be the first place I'd ask, though.
I think Roots Heart & Soy uses organic locally grown soybeans. Maybe they'd sell you a bag? Or chat up the farmers at one of the many farmers' markets around town?
So neither Bourbon Barrel foods or Heart & Soy will sell me soybeans. Any other leads (Rainbow Blossom does not have them either)? Anyone seen them at a specific farmers market?