Lost a Fly box on the Methow River

Lost a black plastic SI anglers fly box on the Methow River August 24th, it was dark when I came off the river. I fishing along the county road (Stokes Rd.) approx. 1/4 mile from the State route. The box contained Dry flys hoppers, stimulaters, and parchute syle dry flys about 4 dozen. PM me if found thanks.