Well, i don't know about "New" They did re-develop some drones. Like the three of them, CLR-03-O Celerity (ultralight OmniMech Drone), Revenant (light Quad BattleMech Drone), UABM-2R Lich (Assault Quad BattleMech Drone). The Lich appeared under the radar in XTRO: Republic III, which unlike alot of the XTROs were things that were mass produced, if not limited production. The Zephyr Omni-Drone (Its mod of the SLDF Hovercraft) was being built as early as 3096, i think a lot people have forgotten about it. Major issue with it, is one its configurations wasn't legal due to C3 being included in it. It was in XTRO: Republic I.
That's all i'm aware of. Unless those Missile platforms Republic of the Sphere are building in Terra System have drone fighters.