Does anyone has any ideas where I can find older or vintage  parts?

 I am trying to redo  a 1975 Flying L as original as possible.  The hub caps and lights  are a cream colored plastic or poly of some sort  I have 3 hub caps and the light I need is mounted up on the side by the back door and sticks out about 2".  Remakes would also be ok.

Any help or advise would be greatly appreciated..        Thanks