I needed a compact Tap holder for work, for my EDC bag. so i created this in TinkerCAD and added a profile internally that matches the square end and shaft..

Its a tight fit and it grips firmly.

As mentioned in a comment you wouldn't get much leverage from this but my need is for soft metals such as brass and its for thread repair rather than new threads. (Headboard screws and sofa feet) but something to bear in mind if printing this.