I'd like to add some info for you Carl, John Adams of Aeroclub fame, told me one time that he had made a discovery about the Matchbox NF.11/12/13/14 kit. He said that the radome intended to make the NF.14 was too long and that the NF.12 radome should be used. He said that what makes the NF.14 nose "look" longer was the fact that the windscreen in the windshield was actually set at a steeper angle to the other versions, which made the bottom edge of the windscreen sit further back towards the cockpit opening, with the top edge being where all the other versions have it.
So you could look at using the NF.12 nose instead.