Around 2000, there were some "Pacific Circle" (not exactly the same as RTW, but could be used in the same way as a more flexible and cheaper alternative) fares involving QF, JAL, and NW (and perhaps other carriers, IIRC there was a Guam routing to Cairns that used CO). Pricing depended on bands of how many miles were traveled, but I remember paying around $3000 for a ticket that permitted several stops in Australia and routed through Japan in one direction.