I have a Wheeler 'Space Saver Gunsmithing Screwdriver Set' but have managed to break the '#39FB' flat blade bit on a stubborn Mannlicher M1886 magazine screw. I'm not sure what the '#39' means, but the bit width measures at 9mm / 3/8in.

It appears Wheeler won't sell spares outside of the US, so can anyone point me towards an equivalent sized hollow ground flat bit or complete screwdriver that's available in the UKicon?
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