ultra 320 scsi raid controller driver for sco 5.0.6

I am facing a problem to install sco 5.0.6 in Dell Power Edge SC1420 which raid controller is ultra 320 scsi raid controller .

how/from where to download the ultra 320 scsi raid controller driver for sco 5.0.6.

Plz help with any idea
karzon

SCO operating systems are not supported by Dell for this model.
You will have to determine the make and model of the RAID controller, and find the driver from the card manufacturer.

This system is a P4; you will also have to download and install all of the patches from SCO before placing any workload on the system.