Nice photos Sue, thanks for sharing. These appear to be the foreign species Phaius tankervilleae of south east asia. Very nice pendent flower. Very easy to grow as well.
Tankervilleae has been reported to grow in australia but this now appears to be incorrect and only australis grows here in aus which can look similar sometimes but if you know alot about phaius you can distinguish them quite easily.
Sadly most in cultivation are of foreign stock. That is why i think its important to promote the australian forms considering their state in the wild. They really need conserving by establishing ex-situ populations. They are close to extinction in NSW and the situation isn't looking much better here in Qld at the moment particularly if development continues they way it is and the habitat destruction.
Many of the native forms also end up being tossed out of people collections as well because the flowers nearly always self pollinate. They don't appreciate them and they end up in the bin
Unfortunately most people are interested in showing plants rather than conserving. I have heard there are some native ones around that don't self pollinate but i am yet to come across one.