LS-DOS 6.3.1A for the TRS-80 Model II
Should also work on the Model 12, and the Model 16 and 6000 in Z-80 only mode

These are .dmk-format images of 8-inch floppy disks.  These images
cannot *boot* on any emulator that now exists -- at this writing there
are no TRS-80 Model II/12/16/6000 emulators!  They can, however, be
read as data disks by xtrs or David Keil's TRS-80 Model I/III/4
emulators, using LDOS or LS-DOS with the XTRS8/DCT emulated 8-inch
floppy driver.  You could make a real 8" floppy from one of these
images by connecting an 8" drive to your PC and using the emulator to
copy from the image to the real drive.  The result should boot on a
real machine.

l2-631a.dmk
LS-DOS 6.3.1A, single sided.  This was a pristine release disk with a
Misosys label.

l2-631ss.dmk
LS-DOS 6.3.1A, single sided.  Not a pristine disk; some extra files
present.

l2-631ds.dmk
LS-DOS 6.3.1A, double sided.  Not a pristine disk; some extra files
present.