I was told by the factory guys at the Classic Car Show that if you order a Plus 4 with Alloys and then have problems selling it in years to come as most people consider Morgan's come with wires.
That the factory put on wings to match the width of the track and that the hubs for the wires plus the wires would have their outward edges uncovered so illegal if fitted to car with wings trimed to fit alloys.
The advised that the chassis of all the classics and the tubs were the same width and only the wings and area round the headlamps were changed to suit axle and wheel widths.
Therefore they suggested only ordering a car with wires