[ICOM] Icom IC 720A

[GGLL]

	Hello to the group; I'm trying to fix an uncommon problem in  the 
subject rig, it has a broken filter, FL-29, with center frequency 
39.7315 MHz, part number 39M15B. This filter is located in RF unit, just 
prior passband filters. Although its case pins are marked  IN/OUT, it 
works bidirectionally for RX and TX.
I disassembled it, just to find it's composed of two ceramic filters and 
three coils. Well, in short, one of these ceramic filters is bad.
Where can I get whole FL-29 filter parameters? (impedance, capacitance, 
etc), just to build a replacement if possible. I guess that's nearly 
impossible to get one of these anywhere (also because it is not an 
accessory filter).
Thanks in advance.

Best regards
Guillermo - LU8EYW.