exhaust down pipe question on a 65

do they make the down pipe from the factory manifolds for dual exhaust? i know the trans cross member needs modified though. had some one do it on my 65 cuds and did a terrible job. the driver side turn down from the manifold is way too low for clearance and after very little time all hangers have broken from the rubber part. so i thought it be easier to get the both sides from the manifolds down and try to fab it together vs taking it to another shop and having them tear it apart.