You don't have to go overseas, I have bought parts through two places here
John, who is a member here runs Rustic Spares
http://www.rusticspares.com.auAnd Steve who runs Villiers Parts
http://www.vaces.com.au/photos/villiers-parts/He states on his website that he has some parts for 2G and 3G engines, I have bought rings and gaskets off John and ignition parts off Steve. You may get everything you need from just one of them or a bit from each. Good luck and let us know how you get on.