Here are a list of my spare OMNIBUS cards:

G104 MM8E 4K Memory sense/inhibit
G227 MM8E Memory X/Y drivers
H212 MM8EJ 8K Memory stack
M837 KM8E Extended Memory and Time Share Control
M8300 KK8E Major registers (x4)
M8310 KK8E Major register control (x4)
M8319 KL8A PDP-8/A 4 channel serial I/O
M8320 KK8E Bus loads (x6)
M8321 TM8E Magtape output control module
M8322 TM8E Magtape control and data break module
M8323 TM8E Magtape transport status and control module
M8327 TM8E Magtape register module
M8330 KK8E Timing board (x6)
M8335 VT8E
M8336 VT8E Video Display Clock and Frequency Divider
M8337 VT8E Video Display Line Buffer Module
M8340 KE8E Extended arithmetic element
M8341 KE8E Extended arithmetic element
M8342 LP8E Centronics printer control (replaces M8329) (x2)
M8357 RX8E RX01/RX02 interface
M840 PC8E High speed paper tape reader/punch (x2)
M8416 KT8AA PDP8A Memory Management (hex wide)
M8417 MSC8DJ PDP8A 128K MOS Memory (hex wide)
M842 XY8E X/Y Plotter Control (x2)
M8433 RL8A Disk controller for RL01/02 (hex wide)
M847 MI8EP Hardware Bootstrap Loader for RX01/RX02
M848 KP8E Power fail and auto-restart (x3)
M849 KK8E RFI shield (x4)
M860 DK8EP Programmable Real Time Clock
M865 . Console Teletype Control (current loop only)
M8653 KL8M Modem Control, used with KL8* to provide data ready stuff
M8655 KL8JA Terminal Control (UART based substitute for M8650) (x3)
M868 TD8E DECtape Control (x2)
M880 MR8E H241 daughter board. Labelled MAINDEC-08-DHMRA-A
M935 OMNIBUS bridge (joins two adjacent backplane segments) (x4)