Quick update:
Replacement screws have shipped! Should receive them Monday, or Tuesday latest.
Ended up facing another small minor issue...Somehow my site oversold a few hundred Zealios for 62g (and possibly other weights which I cannot confirm yet). It may have been a mistake on the packing end, not receiving enough switches, or minor glitch while managing order quantity/weight changes/etc. It shouldn't affect the majority of customers, just a very small minority of last minute orders. I usually keep a 100-200x switch buffer to prevent these kind of scenarios from happening, but the bulk of the switches sold faster than anticipated.
I'll be arranging a small "R4.5" order with Gateron to fix this. May open up orders later, once confirming a few details with Gateron & other parties. This will not interfere with fulfilling the remaining orders.