Thanks.
The above are the only ones listed on the manufacturer's site.
I've no idea what the relationship between Red Hat Linux and RHEL is, but from your comment I suspect none of these drivers are usable.
The card presents attached drives to the OS as hde, hdf, hdg and hdh which the SME installer configures as a RAID 5 array over three discs plus a spare, and which isn't what I want. I only want two drives as a RAID 1 array with the other two for additional storage.
Is there any way of manually configuring RAID within the install, as most distributions permit?