I can't help you with the front cover, but as far
as the disk drive,
probably any single-sided, single density 5.25" drive will do, such as a
Tandon T100 (I hope I got the model right).
Some Chromemcos were DSDD (such as Tandon TM100-2 (aka PC 360K))
I have various versions of Cromix on 5.25" and
8" disks, but will have to
dig these out, and the chances of this happening in the next 2 months is
close to zero :( Is that what they used for these systems, or did they
use CP/M? In that case, again, I have the OS, but it will take a while to
dig them out.
They also used CP/M.
There were a couple of different Cromemco CP/M formats SS, DS, ....
They made some dual processor systems Z80 + 68000, for a LOT more money
than the Radio Shack model 16 (a cheap dual processor)