Asking for help in finding a 1930’s or earlier authentic BOSS OF THE PLAINS in 7 3/8-7 5/8

[TrueVintage]

I know these are rare and in larger sizes even harder to come by. Just hoping someone might point to in the right direction to maybe find one. I completely understand this will not be an inexpensive purchase and prepared to pay. Have about 20 or so western vintage hats.
Had one made at Rands & O’Farrell.
Just not the same as the real thing.

Kinda obsessed with this.
Thanks!
James C