Time for somebody (with a micro-lathe? haha) to make a screw driver hex bit to fit the typical screw driver handle. MUCH cheaper than a whole tool!
OK, I guess BonnyUSA's idea of blacksmithing a piece of solid break line into a "D" shape on one end is a start. The other end could then be soldered onto a spare phillips/cross screw driver bit. Guess Pops here will have to do that for DanB's bike.