The last remaining Australian supplier to Jabiru engines was possibly Camit
Many parts imported from Asia and other places now and for some time
China and other low cost production countries can do the work, just QA is sometimes poor for the reasons Bex has pointed out.
It hasn't treated jabiru well. Lower grade Valves with collets that don't fit. pistons with crook grooves and circlip seats, coils, senders, wasn't there some faulty filters?
Jabiru just HAVE to work out customers want good not cheap in engines.
If they offered an engine with all "branded" parts that cost $2K extra, people would pay it.