I will start with Don't put it in a container you are risking damage to the hull, it is not meant to have all the weight on its side. You can fit it in a high container but you may have to strip the trailer somewhat. It cheaper in a container but the risk is there.
Trailers in AU can be 2.5 mtrs wide ( about 98 1/4" in your language).
It is usually easy to convert 102" USA trailer, you can move the guards in as far as they can go and cut or change the axles . I have done it a few times . As long as you know in AU you need brakes on all wheels and a breakaway so electric over hydraulic is the cheapest option, you can also use the Alco system ( air over hydraulic), change the lights , mudflaps , change the coupling to 50mm, clearance lights , reflectors , compliance plate, roadworthy from authorised inspection station and a weighbridge ticket.
I just bought another GW228 on a trailer she will be shipped from Jacksonville the end of January arrives in Port Kembla early March.
Are you in AU Mous? If you are and you need advice to comply your trailer PM me .