I have found this great old warehouse where they house a vast assortment of new old stock (never used) 

I'm offering these Cabochons in an earring kit option
The posts are also vintage, all you have to do is put them on the wires.
Or you can purchased them alone in the brass prong settings 

Style:Vintage Oval Glass Cabs in Brass prong settings
Finish: Jet Glacier in Brass settings
Size:13x18mm
Quantity: 2

the silver wires are Silver Ox Plate

The gold wires are Gold Plated