gangbangs in sydney or Newcastle

We are a couple, both bi, and are looking for her to experience a gangbang with some respectful males, preferable bi as that is a big turn-on for her as well.
Hoping for some recommendations from those in the know that we could pursue as of course, finding a good group is never easy and trying to set one up is fraught with no shows and just too time-consuming.
Any advice from those with experiences as to groups and profiles for gangbangs are much appreciated