Morris Minor Owners Club

Does anybody know what speedometer cable I would need to get to connect a marina gearbox to a minor speedometer? I am dieing to rip the marina clocks out of the driver’s side glove box and jump up and down on the horrible things!

I've not used them myself (others here have), but I've read good things about this lot - http://www.speedycables.co.uk/ - who should be able to help.