I'm dialing in the final details on my Biarritz and would love to know what my fellow '56 Eldorado owners are using to create the awesome "two-stacked-exhaust-pipes-per-side" look I've seen on so many cars. (A treatment which, according my 1954-56 Authenticity Manual, is now recognized as correct for this model.) These tailpipe extensions (working on the bottom, dummies on the top) are all chromed; some are straight pipes, others have a slight trumpet flare at the end. But I can't find anything like them. Are these all custom-made pieces or am I overlooking an obvious source?