It's not close to Sydney but the price difference may make it worth the trip...
Did mine in a B55 at Royal Vic Aero Club (YMMB). The B58 covers the B58 ticket. Good rates and professional mob. Would obviously recommend doing an ICUS run in a 58 before flying it with pax though.
Good luck! They are a fun plane. Just be bl**dy careful with your fuel quantities! The gauges are as useful as tits on a bull, and you can't dip the tanks either.
They still go very well at MTOW, although like any light twin, there are no guarantees on one donk
CS