Thanks again, but unfortunately it is the nylon acorn bit on the end of the gear lever that locates into the end of the selector rod that has disappeared and needs replacing.
I am on my third attempt at turning one on the lathe and I keep trying
slightly different profiles but still am unable to select all the gears. Unlike a ball and socket the profile is going to have to be spot on for it to work.
I will just have to carry on until I hit just the right shape could be a while at this rate.
Steve