Hi Martin, I looked into doing this a few years ago but was told that the wings on a wire wheeled car were wider to accommodate the greater offset of the wheels. Perhaps someone can confirm?
The centre lock nuts, if I remember correctly, were £120 each at the time so I abandoned the idea. Perhaps it would be cheaper to convert to plus 8/ roadster alloys or swap with someone although you would have the same problem with the wing offset. The centre nuts look very similar externally to the Aero 8, can't help with the splines etc. I'm afraid.