I present to you my entry for the second round, the TIE/G starfighter.
Gee, you want a backstory? Let's see...
The TIE/G starfighter was an experimental spacecraft commissioned by the empire shortly after the fall of the republic. The TIE/G enabled imperial scouts to travel far across the galaxy in a familiar cockpit, with familiar controls and interface, without special training, as the trademark 'bubble' cockpit was lifted directly from the TIE/LN and fitted into this new craft. Few of these craft were produced, and fewer still ever saw service after Tanstarii levelled the only factory with the capabilities of manufacturing the craft, under contract from the rebellion.
Editted with updated photos