[Milsurplus] Wanted - parts for AN/FCC-3 TTY multiplexer

[Nick England]

The FCC-3 is a frequency division multiplex 12-channel TTY system. I would
like to get at least one channel pair operating. I have one receiver unit
and one transmitter unit, but the channel frequencies don't match. So I am
looking for more channel units or plug-in filters so I can make a match.
Filters are made by Burnell for 
425, 595, 765, 935, 1105, 1275, 1445, 1615, 1955, 2380, 2800, 3280 cps (Hz)
Photos of channel units and filters are at
http://www.virhistory.com/navy/rtty-mux-fcc3.htm

Please let me know if you can help. (I also need a manual NAVSHIPS 91901

P.S. I'm also looking for any units of the AN/FGC-5 time division multiplex
4-channel TTY system.

Many thanks,
Nick England
Chapel Hill NC
http://www.virhistory.com/navy