Update:

I bought the lights from Chevs of the 40s or whatever their hot rod supply sister company is called. $180 + $18 for a flasher for them seemed like too much, but I did it anyway.

I found some similar tri bar with turn signal lights on ebay for $50, but the seller didn't take paypal and didn't return emails even though they had 20 listings, I wasn't comfortable.

When I purchased them via internet for the discount they were on back order like everything else. Kristen at Cot40s said she personally sells 2 sets a day. I got them a couple weeks later and they are plastic. I was a little concerned.

They are installed and the turn signal is hooked up. The parking light function makes the turn signal a little hard to see during the day, so I left it unhooked.

They sure clean up the front on a big art deco, $200 well spent. Will post pics when the painter finally delivers the truck.

Chris