Really Right Stuff Now Shipping L-Plate for Nikon Z7 + Which Generic Plates are Best
See my Really Right Stuff wishlist.
From Really Right Stuff:
The first Nikon Z7 plates are starting to go out this week.
As for generic plates, the BP-CS has the flange to prevent rotation. The BPNS has the cork gasket. Either would work in a pinch for a generic base plate.
Also, some generic plates work well on the Nikon FTZ lens adapter.