These are my collection of TOA 900 Series modules.  Most are MK2 modules, but some like the X (old vesion of U) and H (old version of M) are original series modules that would have been in the silver-face amps and mixers.  Older or newer version doesn’t matter, except the newer ones are made with SMD/SMT technology.
I used to do board level repair of TOA Electronics equipment, and this was my stock of test modules, so I know they work.  I’m not including the screws with these modules, but you should have the screws from where you took out the cover plate to put the module in.
Free shipping in the US.
If you’re not sure what you need for your application, you can find the TOA module guide online, just google it.  Or ask me.  I’ll be able to lay out what you need for your inputs and muting scheme you desire.
Here is the list of what I have and their descriptions:
U-11S (terminal block connector) Unbalanced Line Input with mute-receive
U-11R (RCA jack) Unbalanced Line Input with mute-receive
U-12S (screw terminal) Unbalanced Line Input with variable mute depth
U-13R (RCA jack) Unbalanced Line input with mute-receive & high/low cut filters
U-21S (5-screw terminal) Unbalanced Line Input with Remote Volume Control
X-01R (RCA jack) Unbalanced Line Input
X-01S (screw terminal) Unbalanced Line Input
X-11S (screw terminal) Unbalanced Line Input with mute-receive (old version of U-11S)
B-01M (XLR Male jack) Balanced/Unbalanced Line Input
B-01P (1/4″ Phone Jack) Balanced/Unbalanced Line Input
B-01S (screw terminal) Balanced/Unbalanced Line Input
B-11S (screw terminal) Balanced/Unbalanced Line Input with mute-receive
B-41s (terminal block connector) Balanced/Unbalanced Line Input with mute-send
S-01S (screw terminal) 1kHz Sine Wave test tone generator
S-03S (screw terminal) Signal Chime, one tone or continuous
S-04S (pluggable terminal block) switch-selectable chime/tone, one tone or continuous
H-01S (screw terminal) Microphone Input (old version of B-01S)
L-01S (screw terminal) 600-ohm impedance matching input
L-11S (screw terminal) 600-ohm impedance matching input with mute-receive
L-41S (terminal block) 600-ohm impedance matching input with mute-send
L-41s (screw terminal) 600-ohm impedance matching input with mute-send
M-01F (XLR female jack) Microphone Input
M-01S (screw terminal) Microphone Input
M-11S (screw terminal) Microphone Input with mute-receive
M-41S (pluggable terminal block) Microphone Input with mute-send
E-01S (screw terminal) Equalizer module
E-03R (RCA jack) Equalizer for F-122CU Speakers
F-01R BBE Sound insert module with Definition and Lo Contour adj.
AX250D APHEX Aural Exciter Line input with RCA Jack
T-01P (1/4″ Phono Jack) Line Output