Yahama CRW-3200SZ, I belive it's the only SCSI CD-RW remains out there, but it's a very good CD-RW. It's a dual-mode burner, can be set to IDE or SCSI.
The Pioneer DVD-305S would be a good choice for SCSI DVD-ROM, and I think it's your only choice also. You're very limited when it comes to SCSI, but luckily your only choices are good choices.