Actually, I guess what I really need is one of those 14 slot double
high BA23 rack mount chassis that DEC used on big MicroVAX systems.
It probably wasn't called a BA23, but it was effectively two BA23s
stacked up, with two power supplies, a double backplane and room for
four 5 1/4" drives.
Just in case somebody happens to have one lying around that they
don't want :-)
Bob