That trick would be very difficult to use in poster's application. The carburetor he is referring too has a much, much smaller adjustment screw. To aid in difficulty, it is recessed in further than most and the hole around it is only a hair's width bigger than the screw. I'll bet the screw head is no bigger than 3-4 mm.
The part number for the handle only is 91086. It will be difficult to find at a reasonable price. I suggest if you can order one, order at least 2. I have broken 1 of them in the past because the ends are very very thin .