I have my bulk materials and the current stop is the lead time on the PCBs' arrival. The minimum quantity for PCBs I could feasibly pick was 5 and the lead time on the PCBs is nearly a month. This means that, assuming the PCB works fine, the first 5 orders for the keyboard are going to be sent out earlier.
The last order that fits within this window is #1066.
Fingers crossed that everything on the case fits together with the PCB and the keyboard works smoothly!