This is a rare item . Fans do break. The fan adjustment cast alloy tower assembly sometimes collapses resulting in lots of damage to fan and radiator and more. Alternatives are hard to get by. Here is a complete set. The bottom end which is mounted on the upper front of the engine blocj, the adjustable fan axle and the alloy fan itself.
A pair of steel front hubs suitable for a front axle for a lightweight cyclecar. 44 - hole hubs. 100mm wide from flange to flange. One has an axle with brass nutted cap and the other is missing the bearings and axle. with an aluminium cap.