Sourcing black locust roundwood

I'm in central Massachusetts.  We're looking for seasoned black locust roundwood to use for flooring in our farm shop (cut into discs).  Anyone know of a place?  We're going to need to start in 2-3 weeks from now (23 July 2021).

Black locust is not permissible to grow here and I'm wanting to make a statement while also using a natural material (partially to assuage my guild over purchasing a pre-fab building).

Anyway, if you know of where we can get some seasons black locust roundwood near us, I'd love to know.

Nissa