Have you tried Skippers at Perth, last I heard they charge you $5500.00 for a metro endorsement, this includes ground school, endorsement and approx 30-50 hrs line flying. Not sure about conditions, mates of mine over here on East coast who flew for Skippers say people arent very happy but at the end of the day they are very new metro's with all the fruit. GWA's 1900 are older aircraft and expensive endorsement with no guarantees of employment, (but I could be wrong, just what Ive been told).
I spent a few years on Metro's over here in Sydney, and I would have to say it is some of the best time Ive got. (no autopilot).
"At the end of the day all I was , was a flap operator"