Antec P182SE Special Edition Mid-Tower Case Review - PC Perspective
Antec: "Is not possible to install another cage" : r/DataHoarder
Antec安钛克P101 HDD CAGE硬盘架2个装
Antec Performance Series P7 Silent, Mid Tower Computer Case, 2 x USB 3.0, Sound Dampening Side Panel, 2x120mm Fans installed, Support up to 6 Drive Bays - Newegg.com
Finally found reasonably priced extra drive cages/trays for the Antec P101 (plus a less ridiculous looking motherboard!) : r/DataHoarder