Stephen,
   The flexible exhaust unions you are looking fog are availible from J.C.
Whitney. I saw these on their web site while looking for mandrel exhaust
bends, which they also have. They have a  corrigated stainless steel center
section with various sized end pipes. Dynomax also lists a few of these in
their catalog.
      hope this helps'
Dennis Atkins
3A AudiVan

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