Nikon Df Stock Status page launched: all 4 kits are in-stock now
As of the time of writing, both Nikon Df special edition kits (black or silver; $3000 each) are in-stock at multiple retailers including OneCall and Amazon itself and Gearshop and Adorama and B&H Photo.
Of the body only kits, the silver appears to be in-stock at Adorama. The product page does not say it's out of stock and when you add it to the shopping cart, it does not show any out of stock warnings. Keep in mind, we go by what the shopping carts say. We can't buy a new camera every few minutes just to test its stock status! As it is often the case with hard to find cameras, sometimes the shopping carts may not be accurate.