I've got my twin carb setup on ebay australia.
Postage to the US at $160 is less than it actually costs me to send it.
http://www.ebay.com.au/itm/181285992540
If these are still available I'm interested. It will depend on what it will cost to put them on a container to Australia.
If they haven't sold, let me know and i'll make some calls. Thanks.