I have the following which are now surplus. Nearly new (Less than a month's use before I got my Omni VII) INRAD Filters: #750 6.3MHz 400 Hz CW #766 9.0Mhz 1000 Hz CW or Digital. $100 each Ten-Tec RTTY 500 Hz ( 9Mhz ) for Narrow position. $65 Will pay shipping in US if bought as a package.