I’m still searching for mid-century mailboxes on ebay.
You never know what you will find.
I found this New Old Stock (NOS) Leigh mailbox; colonial design. Starting bid is $200!
What is really interesting though, is that the ornament assembly instructions have Solar Group printed in the right bottom corner!
So, I’m thinking, the mega-player in mailboxes, Gibralter Industries (Solar Group), acquired the retro-cool player Leigh Building Products. I wonder if they still have any of the dies?
mid-century modern mailbox 
I have five of them.. The boxes are a little water damaged, but the mailboxes are like New. If interested they are seventy five dollars each. Don 217 414 5749