Ed is a great guy, and unfortunately, he is too busy to fly over and hand deliver each international order for everyone
It is a postal service and it is relying on several services all running efficiently and sellers have no control over international and local postal services. Whinge and carry on and then he will cease sending anything to Australia. One of the reasons he specified mandatory insurance is because of dishonest international buyers.
It is not my place to to advise anyone how to manage their ordering, but I've always found that if you keep a stock of common parts in abundance, you seldom fall into this trap of waiting for parts and relying on each and every hour passing..
As far as my experience is concerned, I have ordered thousands of dollars worth of parts and never had an issue that was not resolved. If a package goes missing, blame the system (insurance company in this instance), not the seller. Remember, a seller can ban you from buying parts from them if you decide to vent your frustration on them.
Cooler heads must prevail..