You can't buy the carriers from Dell directly, but you can buy them from suppliers online: Carrier: [URL] Adapter (for 2.5"): [URL] 
Hello, could someone give me the part number for HDD adapter from 2.5" to 3.5" about PowerEdge T430?I would like to add some 2.5 HDD in the 3.5 hot-swap bay but I'm unable to get the right hard-drive adapter in the store. Please see here for more details:[URL]
2.5 HDD adapter per PE T430