I'm looking for a 250Hz, third IF (455) filter for the FT-1000D (XF-F). This was originally called the XF-455K-251-01, and is now called the YF-110CN. It was an option even on the D model. If any of you have replaced it with, say, an Inrad filter or something else, and have an extra Yaesu filter, please let me know if you'd like to sell it. 73, Chris, W2PA