The 2 different types of Victa starters are different heights ,the starter cup would be to high up with the earlier starter but you may be able to use a lower starter cup,It might be a good idea Norm if it fits in ,looking at the parts it looks like it could be done.
I think you could grind up a starter pawl Blue from a high tensile bolt as long as the alloy part it fits in isn't damaged too much.