This image comes from a boot disk I made based off an old 2101 HDD installation. Since it doesn't come from an official disk, I can't verify that it contains all of the proper 2.11C files, but it seems to have most of them. It also boots just fine on all Compass models. 

Keep in mind this was designed to run specifically on the GRiD Compass series, so it's unlikely to work on GRiDCase series or later computers.

Disk Type: 5.25", 360kB
Disk OS/File Format: MS-DOS (FAT12)
Disk Image Format: ImageDisk (.imd)

--------------
|GDOS211C.IMD| - GRiD MS-DOS 2.11C for GRiD Compass
--------------

File Name                       File Type       Version/Date
--------------------------------------------------------------
COMMAND				.com		11/10/83
CONFIG				.sys		2/11/85
MODEM				.sys		3/05/85
RAMDISK				.sys		12/18/85
SCREEN				.sys		2/10/85
SERIAL				.sys		7/25/84
SYS				.com		10/19/83
FORMAT				.com		12/18/85
ASSIGN				.com		12/11/85

\DOS
TREE				.com		6/03/85
SYSCOPY				.bat		1/15/85
SYS				.com		10/19/83
CONFIG				.exe		1/19/86
DEVICES				.exe		2/22/83
EXE2BIN				.exe		10/19/83
FC				.exe		10/19/83
FDISK				.exe		1/23/85
FIND				.exe		10/19/83
LINK				.exe		10/19/83
PHONELINK			.exe		6/05/85
SCRMODE				.exe		1/19/86
SERVER				.exe		6/05/85
SORT				.exe		1/30/84
DISKCOPY			.com		10/19/83
ASSIGN				.com		12/11/85
BACKUP				.com		7/24/85
CHKDSK				.com		10/19/83
COPYBOOT			.com		12/21/84
EDLIN				.com		10/19/83
MORE				.com		10/19/83
PRINT				.com		1/31/84
PRINTSCN			.com		1/13/86
RECOVER				.com		10/19/83
RESTORE				.com		7/25/85
MODEM				.sys		3/05/85
RAMDISK				.sys		12/18/85
SCREEN				.sys		2/10/85
SERIAL				.sys		7/25/84