Hi Ian
Here's a logo I've made up for FADO. As for the GLF4, my MASPS list shows this as operated by Pegasus Elite Aviation, so I've done their logo for their Flight ID, but their websites are down at the moment (possibly gone out of business??) so I've also done the logo of Transnational Management Systems, whose website consists just of a photo of the aircraft.
FADO - Belgian Air Component (ex Air Force) F-16
PJ71AV - GLF4 of Pegasus Elite Aviation
N771AV - the same GLF4 of Transnational Management Systems
Rod