B.splitI'm really not sure why they don't make it an option. Presumably they're going to make their order with Tai-Hao after the drop is over and they've received payment. So it's not like they're limited to only selling what they have in stock.
Not only will they lose out on purchases of the non-standard kit, but also the base, iso, and international kits, as people like myself won't buy anything if non-standard kit is not available.