I have added a room and have a spare radiator ready to install. this system has two pipes, side by side, inlet and outlet. I am missing the casting that has the two pipes and screws into the 2 inch threaded opening in the radiator. I know I could just run a pipe ito each end, but I’d like to match the rest of the house. Anyone know where I’d get such a fitting? I could send you a picture if that would help.