I've had luck finding some trim on ebay, NOS but!!!!! the trim is not perfect.  There are scratches, tiny rust marks, shelf ware,etc.  The stuff on my car is as good.  A fellow car buff warned me about getting some pieces too shiny and perfect..makes the rest of the car look dull.  For a driver car, I'll live with it.  Last fall I went to a RM auction in Toronto and looked at a very nice but not perfect 58 Fairlane convertible.  The trim was really nice but I asked how much to get that way.  $17000 CDN to polish and de-bump it.  Wow. that's more than I paid for my whole Fairlane.  Yes it costs money....a lot of money.