HP 826690-B21 that's usually much more expensive than this, even on ebay. They have at least 2 of them too:
HPE DL38X GEN10 PREMIUM 8SFF HDD BAY - 826690-B21-BSTK - Z - CDW Internal Use/Service Pts - CDW.com
HPE DL38X GEN10 PREMIUM 8SFF HDD BAY - 826690-B21-BSTK - Z - CDW Internal Use/Service Pts - CDW.com
HPE DL38X GEN10 PREMIUM 8SFF HDD BAY - 826690-B21-BSTK - Z - CDW Internal Use/Service Pts - CDW.com
HPE DL38X GEN10 PREMIUM 8SFF HDD BAY - 826690-B21-BSTK - Z - CDW Internal Use/Service Pts - CDW.com