There doesn't seem to be any agents or distributors for commercial Mauser actions here in Australia. Graeme Spragon used to bring in Reimer Johanson actions which were sold by Recknagel but that has stopped. GMA used to advertise here but had no distributor. I spoke to Mayfair engineering and they were more than happy to sell me an action if I organised all the import paperwork and shipping.

The most cost effective way would be for several people to buy some actions at the same time and therefore the paperwork and customs only has to be done once.
There are several importers who would be happy to do the importing.

Waidmannsheil.