I am looking for the 455 kHz 500 Hz wide CW filter for the Kenwood
TS-930S.  I believe the same filter is used in several Kenwood models.
The one for the TS-930S uses a mounting board to plug it in, and has
the -1 after the part number.  if memory serves, it's a YG455C-1 or
something like that.
 
If you have or know of one please send email to bob.albert@juno.com or
send a note here or use my callbook address.
 
73 DE K6DDX
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