Another idea that I have used in the past (unfortunately I don't have a picture) is to get copper plumbing pipe and elbows of the appropriate diameter. Solder them together in the necessary configuration and use a short piece of rubber hose & clamps at each end to make the connection. It helps if you put a bead of solder around the ends so the hose doesn't blow off under pressure. The whole thing can be polished for a nice look.