So, I have it on reasonably good authority that the Kerker megs are very likely made in Japan by one of the better exhaust builders. So they 'should' be of a better quality than the supertrapp ones from the US (possibly even better made than the originals

), but don't hold me to that as I've still not actually seen one in person, in Japan.
I've found that they could be purchased new for about $1000 and shipping would be around $150 from Japan to Aus. The maximum package size is more than capable of accommodating a full exhaust system!
Of course if you want it insured at full price you will have to pay the incoming duty, but that is completely up to the buyer.
I could buy it (since I live here for the moment) but my money is better spent on other things as I'm returning to Aus in a month. I am not running a business and as such these are the prices that I could personally buy and post them for. There is other ways to get them from over here but they could cost a little more. PM me if you want more info.