Viltrox is going to announce a new 85mm f/1.8 Z mirrorless lens for Z-mount next month (December). Viltrox already has the 20mm f/1.8 lens for Nikon Z-mount (in stock at Amazon, you can get it cheaper directly from Viltrox). In the US Viltrox lenses are sold at Adorama, B&H, and Amazon. For Black Friday all Viltrox lenses are up to 15% off (until November 30):
Most of the Black Friday deals are still ongoing.
Via NikonRumors