I'm in the middle of writing a TYI dumper so that one can take a YM2612 VGM of their choice and get TYI-formatted versions of the FM presets in the file to use with this VSTi.
If I do it right, it will also be able to offer dumping YM2612 to Kaneda's YM12 format, VGM MM's TFI format, and/or ...