As previously mentioned, Astromart is your best shot for the AP900 (second hand). Wait list is considerably long for one off the production line. A second hand AP900 GTOCP3 goes for around $US8k. I've seen some AP900 GTO's (CP and CP2) go for less - around $US6k.
A second hand Tak NJP - Temma 2 goes for around US$5K.
In both cases, prices excluding shipping from the US and does not include a tripod (equatorial head only) - which is typical for the high end mounts. You generally mount them permanently on a pier or purchase the tripod at additional cost.
I'll "name drop" the
Losmandy Titan as a user of this mount. May or may not meet your criteria. You can pick up a new one for A$11k (including shipping from US). Its priced between a new Tak NJP-temma 2 at A$10 and Tak EM400-temma2 at A$12k.