If you have a broken fan blade on your CJ10A with the original SD33, the Nissan 280ZX fan is supposedly the same piece. I have not tried this personally but it looks to be very similar. I don't own any SD33s anymore to compare. The center portion intended to bolt to the fan clutch is different but it may be possible to use the original center of your broken fan and the plastic from the new fan.

https://www.thezstore.com/product/2419/factory-fan-blade-plastic-74-78-260z-280z
1974, 1975, 1976, 1977, 1978
Datsun 260Z, 280Z
Part 16-7044

Another option may be the 21060-L6000 from https://www.ombwarehouse.com/21060-l6000-nissan-komatsu-kalmar-ac-fan-blade-for-h30-and-sd33-engines.html. It claims to be SD33 compatible and has the appropriate fixed hub for the CJ10A SD33 pulley. If the fan blades face the wrong direction it may be possible to bolt it on backwards and still have enough clearance to the radiator.