Hello matt33, These should be the cables needed. These are Service Part numbers. Sales uses different part numbers. I hope they can call you back.   RD5DW - ASSY,CBL,SAS,BKPLN,R540 W6W09 - ASSY,CBL,PWR,REAR3.5,MB,R740 YPG1H - ASSY,CBL,I2C,PWR,BKPLN,R540  
Sales seems to be having issues with their internal systems. Two have said they'd email be or have somebody call me back within 15 minutes the last few days. Anyway... Could somebody please tell me the part numbers for the SAS cable, data cable, and power cable needed for the 084XP0 rear flex bay? Thanks!
R540 rear flex bay part list