Here's Concurrent CP/M-86 for the DEC Rainbow.
Files included are:
ccpmgsx.td0 = GSX (Grafics routines and support)
ccpmsys.td0 = The CCP/M boot floppy
ccpmutil.td0 = Some utility programs
These files need the PC program 'Teledisk' to create the proper RX50 floppies.
Teledisk can be found in ibmpc/util.