seeking a good vocal teacher

Hey guys, Ive recently started taking vocal lessons for the past 8 months and thoroughly enjoying it. I'm hoping to continue to improve my vocal technique however, I'm in search of a good teacher that can help me take steps forward. Does anyone know any good vocal teachers in Perth, W.A that can help improve techniques? I'm hoping to work towards exams and really need help with improving vocal range, strength and pronunciation. I'm just finding that my current teacher at a music school isn't really helping. I'm after someone who would have more experience. Any suggestions/ direction would be most appreaciated :)