This product is either discontinued or we cannot get that from suppliers.
Qnap CABSAS10M8644808 Cab-SAS10M-8644-8088 Mini SAS Cable, Data Transfer Cable, Cable Length: 3.28 ft, Connector on First End: 1 x SFF-8644 Mini-SAS, Connector on Second End: 1 x SFF-8088 Mini-SAS, Color: Black.
The QNAP Mini SAS Cable CABSAS10M8644808 is specifically designed in order to work accurately with REXP-1220U-RP, REXP-1620U-RP, SAS-12G2E-D and SAS-12G2E-U.