Hard Disks Compatibility and Increase Capacity SCV2030

I need a DELL storage array SVC2030 to increase capacity by populating 9 additional bays. I contacted DELL and they basically did not help as the disks are no longer available, and instead offered me to buy a new array which is not what I need now. Since DELL dropped the ball in assisting here, I am hoping someone can suggest what my options to purchase disks are, all I need is compatible disks. Any suggestions are much appreciated.