The HV screwdrivers are just next to the left-handed screwdrivers in the shop  hahahaha

Being a TV tech as part of my job for over 2 decades, i can safely say that we've never had an official HV screwdriver or discharger, although plastic/insulated screwdrivers with earthing clipleads have been our main discharge tool for TV tubes.

Be aware that no matter how careful you are adjusting focus pots etc, you can still get a nice buzz from the EHT HV lead, especially leaky ones waiting to bite anything that moves near them.

If you can find solid plastic shaft screwdrivers with either plastic or metal tips, they would be preferable.

MM.