I know they are very proud of that rye, very proud (rightfully) of their contribution to its success. BF certainly doesn't create brands like a HH or BT does, but it wouldn't surprise me if, since they were making it anyway, they put down a few barrels of their own.

Their policy is that they will do contract distilling for the other majors but they aren't interested in making and aging whiskey for the spot market.

This fall's Masters Collection will be a rye, so that might be an indicator that they're considering it.