HP ProLiant ML350 G4 Server HDD Server Filler Tray- 349460-001 | eBay
778157-B21 HP HARD DRIVE BACKPLANE AND CAGE ASSEMBLY KIT SMALL FORM FACTOR 8 BAY FOR HPE PROLIANT ML350 G9 - ( 1 ) ONE CAGE ( 1 ) ONE HDD BP ( 8 ) EIGHT SFF HD BLANK FILLERS ( 4 ) FOUR TOTAL SCREWS