Certon Integrita X-5 20TB NAS

As this company is no longer in existence I am looking for the software found on the 5 x 4000 GB hard drives. I have a 10 TB unit and replaced failed drives with the more common 4000 GB drives. . The Integrita sees the 4000 GB drive but only formats them as 2000 TB thus the usable space is 6TB. I was in contact with former employees but have been told the software no longer exists except out in the field. To make it work correctly I need a copy of all 5 drives.