Hi Matt,
dont tell me about the welding.
You'd need a fair bit of gear to make a 20ft container worthwhile.
I'm sure I read somewhere you can have your itesms sent with otherpeoples, in part of the container.
What about talking to Yesterford or Taffs in Adelaide, or the Escort guys on FB?
Many of those seem to import container loads of stuff direct from UK (especially TAffs), with gearboxes and Duratecs in particular. Perhaps you can pay some $$ to contribute to their next shipment and have it included?