I see Classic Auto Parts shows one but you must "inquire", so I assume you have tried and they don't have one in stock.
You may try these guys:
www.gregdonahue.com
They, too, show one but you must "inquire".
I know I bought mine from a Galaxie or Fairlane parts vendor, but I can't seem to locate the exact company.
There's a NOS chrome one on eBay right now.......