I came to the conclusion that it newer existed (since there is a 8086
addon card for the M20 which can run CP/M86 and I finally thought that
people mixed up that version with a native 8000 one).
--
It exists. The port was actually done by Zilog of CP/M-68K, including
converting the utilities written in PLH to C, then given to DR to
distribute. If you look at the BIOS listings in the manual, all of
the code is written by people at Zilog.