Had a brief conversation today with the guys from Coker Tire. From what I was told, they are now the owners of the Dayton name and have been for several years. They are currently working on setting up a wheel manufacturing facility in the City of Industry in southern California. Unfortunately they didn't have access to any specs on the wheels, specifically the backspacing difference between the standard D452 wheel and the D452D that is designed to fit the wide front drums of the BN2, 4 and 6. Perhaps I'll give them a call this week.