Updates:
It turns out there was one Kirby mower starter winder and cap from the 1960s that will fit the Southern Cross and is virtually identical. I will post up the part numbers when I have them. The problem is of course that Kirby mowers from that era are also getting rare.
Looked at two different Howard blades recently which may be a better fit for a Southern Cross. I have also consulted with an engineer friend who may be able to make some high tensile bushings to replace the old ones, which can fit the more common 13mm blade holes. Stay tuned!
The spark plug to suit Southern Cross is said to be NGK B6HS SPARK PLUG (thanks Paul!).
Bendix "Type K" air filter is long gone. I am currently looking at suitable replacements, both housing and filter cartridges.
