Are you sure Zambezi Airlines is defunct? I saw them flying two weeks and some change ago bringing the Zambian leader to Goma.
Prior to the advent of the current 'Zambezi Airlines' from Zambia,
Air Zambezi (my mistake!) was a start up in Zim quite a few years back, in about 2002 if i remember correctly.
They were very much publicized, but only really lasted a few months before folding during the then hyper-inflationary economic environment.They operated an all-prop fleet too, with a fairly attractive Tiger Fish logo.