Looks like I’ll be able to keep the antique going for a while.
I went over to Vetco today and they had a few 9GB SCSI drives of the type I can use on the old server for 99¢ each. So for a couple of bucks I’ve got replacement drives for that machine. I have a spare chassis, CPU, memory, and power supply but the drives were the hard to obtain item.
So that old machine should be maintainable now for a while longer.