I have two INRAD #703C ...400HZ for the 455IF for sale. Never installed them.Current price is $155.00US.. Asking 100.US plus shipping OBO Also INRAD # 528 500HZ for 455IF....100.00 US OBO INRAD # 22 250HZ for 8830 KHZ IF...75.00 US OBO And a YK-88C-1 500HZ for Kenwood.$75.US OBO pse e-mail me direct. Thanks NOEL