Sucks to see your having issues mate. As to what has happened when you say it blown, is still in question. As for a mechanic. See this link, it may help you or not. Plus a location of where you are will help a lot too for others to point you to the right mechanic. 4x4 Obsession in Melton would be my pic for a workshop on north west way.
http://www.nissanpatrol.com.au/forum...2127-Workshops