Kenneth
Standard Bore
Australia mate, but don't let that stop you I have sent many brand new TORs exhausts and Used screens around the world including USA and Russia etc. I have bought a few guards and bits like heads etc from the USA before too and a brand new red stripe tank from the UK so know what freight can cost both ways.
Another Aussie member and mate of mine @Mittzy sent a set of Tins to @Rocket Scientist last year in the USA too, so I will see how he sent them and cost estimate.
I would be interested in at least looking into cost if you are serious.