The Perfect Handle screwdriver is ideal for this application and they are regularly available on FleaBay but expensive as they are quite collectible.
They are quite easy to find at bootfairs too....
...but tend to be pretty grubby...as I said in the other thread...they were very popular with mechanics as they are virtually indestructible.
You can fairly easily replace the scales though...this is Wych elm burr...
...which makes it pretty and useful!
Or you can just clean off the scales if the wood is good using lighter fuel to get rid of the grease and grime and then polish with Tru-Oil...
As you can see...the tip is very wide on this one though the screwdriver is quite small and useful.
Jim