https://jehusgroupbuy.com/collections/frontpage/products/brand-new-sony-vtc6-1-case-200-cells-3-50-per-cell A case of 200 cells for $700, shipped from Cali, could be good for you US-side Battery builders. Much cheaper than on Nkon or INRbatteries.
The only downside I see is that they are not wrapped, and so there’s some extra labor in that.
I dont know, thought i’d share as i know i’d get in on it if i was still stateside