I don't have what you need... But might have a solution.
I recently needed bits like these for the HobbyKing BT-4 touring car. Tricky to get hold of, so I used some of these (not sure which (3mm, 4mm or 5mm), but I can take the relevant bit of the car apart to see if you want).
https://www.technobotsonline.com/nyl...-pk-of-25.html
https://www.technobotsonline.com/nyl...-pk-of-25.html
My son and I have been racing them for weeks now, no issues at all.
I've got a Durango DEX210 and DESC210 so can get the screwdrivers out to see if they fit snug in it if you want. Let me know.
Tony.