You can get centre lock Minilites to fit Morgans. I looked into it as did Williams for me...they were keen on the idea I think...when I fitted Avon CR6ZZs to a set of new wheels.
Whilst Minilite make centre lock wheels for the Plus4SS, they are a one off with cast in splines and the ones they will otherwise provide have their bolt in splines fitted. These are as heavy as 4/4 wire wheels, if not slightly heavier so I stayed with wires.
