[Premium-Rx] wj 8617b-s1 3.2k filter , optional boards and manuals

[martuccif at tele2.it]

i am looking for a replacement filter at 3.2 khz (networks int'l corp.) that i 
would like to replace on the 726009 board (dual if filter that on my receiver 
has been replaced with a 10khz/30khz instead of a 3.2khz/10 khz) at same time 
i am looking for optional boards and manuals related to this receiver.
Please contact me off line if interested .
        73 to all   francesco