I reached out to Squid Music who orders a lot of Shop Floor Customs and they said SD just changed their policy last month and now they have to order at least 5 pickups with the same variation in order to do Shop Floor Custom.
I wonder if that's the same with any other dealers or just them since they order a lot of different variations of pickups and maybe it puts a burden on production?
Maybe it is just if you are a dealer and ordering for stock.